Note: Descriptions are shown in the official language in which they were submitted.
-
CA 02214~33 1997-10-06
NOVEL QUINOLYLOXAZOLE-2-ONES uS~uL AS
PROTEINKINASE C INHIBITORS
This invention relates to certain quinolyloxazole-2-
ones of the formula
R2 F~
O N--R1
o
(I)
wherein
R and Rl are each independently selected from the group
consisting of hydrogen, C1-C6 alkyl, and Cl-C3
alkylphenyl wherein the phenyl ring is optionally
substituted with one, two or three of the substituents
selected from the group consisting of fluorine,
chlorine, bromine, Cl-C4 alkyl, and Cl-C4 alkoxy; and
R2 is a 2-, 3-, or 4-quinolyl group wherein the quinolyl
group is optionally substituted with one, two or three
of the substituents selected from the group consisting
of fluorine, chlorine, bromine, C1-C4 alkyl, C1-C4
alkoxy, nitro and trifluoromethyl; or R2 is a 5-, 6-,
7-, or 8-quinolyl group;
and to the pharmaceutically-acceptable salts thereof.
M01329 -1-
CA 02214~33 1997-10-06
This invention also concerns the use of the compounds
of Formula I as protein kinase C inhibitors effective as
vasodilators in the treatment of hypertension and as
bronchodilators in the treatment of asthma. This
invention also concerns a process for making certain
intermediate ketone compounds which are useful in the
synthesis of the co...~ounds of Formula I.
As used herein, the terms "Cl-C3 alkyl", "Cl-C4 alkyl"
and "Cl-C6 alkyl" mean straight or branched chain alkyl
groups having from one to three, from one to four, or from
one to six carbon atoms respectively, and include such
groups as methyl, ethyl, n-propyl, isopropyl, n-butyl,
isobutyl, sec-butyl, tert-butyl, and the like, as well as
vinyl, allyl, propynyl, butenyl, butadienyl, isopropenyl,
and the like. The term "Cl-C4 alkoxy" means alkoxy groups
having from one to four carbon atoms, and includes such
groups as methoxy, ethoxy, n-propoxy, isopropoxy, n-
butoxy, isobutoxy, sec-butoxy, tert-butoxy, and the like.
When R or Rl is "optionally substituted Cl-C3 alkylphenyl",
the one, two or three substituent(s) can be located at any
available position on the phenyl ring. When R2 is 2-, 3-,
or 4-quinolyl the optional substituent(s) can be located
at any available position(s) on the quinolyl ring.
M01329 -2-
CA 02214~33 1997-10-06
Illustrative examples of the compounds of this
invention include compounds of Formula I wherein the R
groups are designated as follows:
R Rl R2
5 hydrogen hydrogen 2-,3-, or 4-quinolyl
ethyl hydrogen 2-,3-, or 4-quinolyl
propyl hydrogen 5-, 6-, 7- or 8-
quinolyl
methyl benzyl 2-, 3- or 4-quinolyl
10phenethyl hydrogen 2-, 3- or 4-quinolyl
propyl hydrogen 2-, 3- or 4-(6,7-
dimethyl)-quinolyl
4-methoxyphenethyl hydrogen 2, 3- or 4-quinolyl
benzyl benzyl 2-, 3- or 4-(7-
ethoxy)-quinolyl
butyl hydrogen 2-, 3- or 4-quinolyl
3,5- methyl S-, 6-, 7- or 8-
lSdichloro)phenylpropyl quinolyl
propyl methyl 2-, 3- or 4-quinolyl
3,5-dimethoxybenzyl ethyl 5-, 6-, 7- or 8
quinolyl
methyl propyl 2-, 3- or 4-(S-ethoxy-
7-methyl)-quinolyl
butyl butyl 5-, 6-, 7- or 8-
quinolyl
20hydrogen phenethyl 2-, 3- or 4-(6-
trifluoromethyl)-
quinolyl
methyl 4-methoxy- 2-, 3- or 4-quinolyl
phenethyl
As is true for most classes of therapeutically
effective compounds, certain subclasses and certain
species which are especially effective are preferred over
others. In this instance, those compounds of Formula I
wherein R2 is optionally substituted 2-, 3-, or 4-quinolyl
are preferred. Also preferred are compounds wherein R is
Cl-C6 alkyl, as well as compounds wherein Rl is hydrogen.
Most preferred are the compounds wherein R2 is an
unsubstituted 2-, 3-, or 4-quinolyl group, R is propyl and
Rl is hydrogen.
M01329 -3-
CA 02214533 1997-10-06
The 2-, 3-, or 4-quinolyloxazole-2-ones of this
invention can readily be prepared by the reaction depicted
in Reaction Scheme 1.
Reaction Scheme 1
N N 1. CH2C12
~ '~ RMgCl ~ ~ 2. ClCOCOCl
R3- ~ I ~ ~ R3 ~ 3 (CH3)2SO~ (IV)
C~O H-f-OH
(II) (III)
A N ~ N p-toluenesulfonyl
~ ~ ~ H2NOH-HC1 3 ~ chloride
R3 ~ EtOH ~ CH2C12; Et3N
C=O C=N-OH
R (V) R
(IV) ~ R3
R3 ~ N~ 1. NaOEt/EtOH
2.ether 3. HCl ~
C=N-OSO2-PhCH3 O=C-CHR
Br2/48% CH2R (VII) N~2
~. (VI)
R3
N R3 l,l'-carbonyl
diimidazole
Br O=C-fHR
NH-C-l-imidazolyl
(VII a) (VIIIb) O
KCNO, ~ heat
(I) ~
o
wherein R is as in Formula I, R3 is the optional R2 group
substituent(s) of Formula I, and other symbols are as
defined hereinafter.
M01329 -4-
CA 02214~33 1997-10-06
In essence, Reaction Scheme l illustrates that the 2-,
3-, or 4-quinolyloxazole-2-ones of Formula I can be
prepared by reacting the appropriate and readily available
2-, 3-, or 4-quinoline carboxaldehyde (II) in
tetrahydrofuran (THF) with alkylmagnesium chloride or with
optionally substituted phenylalkyl-magnesium chloride
[RMgCl~ to produce 2-, 3-, or 4-quinoline alkanol (III),
which is in turn oxidized with oxalyl chloride (ClCOCOCl),
methyl sulfoxide [(CH3)2SO] and triethylamine (Et3N) in
dichloromethane (CH2Cl2) to produce quinolyl-alkanone (IV).
The alkanone (IV) can alternately be brominated to
compound (VIIIa) and further treated with triethylamine in
dimethylformamide (DMF) in the presence of potassium
cyanate (KCNO) to form the compounds of Formula I
according to procedures well known in the art and
illustrated in the examples herein; or compound IV can be
converted to oxime (V) by refluxing with hydroxylamine
hydrochloride (H2NOH HCl) and pyridine in ethanol (EtOH).
Compound (V) is then reacted with p-toluenesulfonyl
chloride and triethylamine in dichloromethane to produce
compound (VI). The amine (VII) is then produced by
reacting compound (VI) with sodium ethoxide in ethanol
(NaOEt/EtOH), followed by ether and aqueous hydrochloric
acid (HCl) extraction. The amine (VII) is further reacted
with l,l'-carbonyldiimidazole at about 0~C to form compound
(VIIIb), which is then heated to about 170~C to yield the
appropriate 2-, 3-, or 4-quinolyloxazole-2-ones of Formula
I.
M01329 -5-
CA 02214533 1997-10-06
The unsubstituted 5-, 6-, 7- or 8-quinolyloxazole-2-ones
of this invention can readily be prepared by the reaction
depicted in Reaction Scheme 2.
Reaction Scheme 2
N ~ p-toluenesulfonyl
H~NOH HCl ~ ~
pyridine ~ ~ C~2C12; Et3N
C=O EtOH
R Cl=N-o~
(IX) (X) R
~ 1. NaOEt/EtOH
Br2/48% 2. ether 3. ~Cl
HBr C=N-OSO2-PhCE3 O=C-CHR
C~2R NH2
~ (XI) (XII)
N
N l,l'carbonyl
, ~ diimidazole
O=l '-CHR ~ ~ H20 /0~C
I O=C-CHR
Br
(XIIIa) N~ imidazolyl
O ( XIII
\ N 8
Et3N/DMF 2~ ~ ~ 7
KCNO ~ t 3~ 5 ~R 1. heat
O N-~
(I)
O
wherein R is as in Formula I, R3 is the optional R2 group
substituent of Formula I, and other symbols are as defined
for Reaction Scheme 1.
In essence, Reaction Scheme 2 illustrates that the 5-,
6-, 7-, or 8-quinolyloxazole-2-ones of Formula I can be
prepared in essentially the same manner as described for
M01329 -6-
CA 02214~33 1997-10-06
Reaction Scheme 1. The alkanone starting material tIX) is
prepared by metalating 5-, 6-, 7- or 8-bromoquinoline
according to a procedure by H. Gilman and T. Suddy set
forth in J. Orq. Chem. 23, 1584-9 (1958), and then
reacting it with N-alkoxy-N-alkylamine. The 5-, 6-, 7-,
or 8-bromoquinoline compounds are prepared by following
procedures set forth in "The Chemistry of Heterocyclic
Compounds" by Gurnos Jones, as found in Quinolines, Part
1, vol. 32, p. 100-117 and 247-258, ed. A. Weissberger and
E.C. Taylor, John Wiley and Sons, London, 1977. These
procedures can also be utilized for preparing 2-,3-, or 4-
bromoquinolines and their corresponding 2-, 3-, or 4-
quinolinyl alkanones such as those of formula (IV) in
Reaction Scheme 1.
Alternatively, the formula (IV) and formula (IX)
compounds of Reaction Schemes 1 or 2 can also be prepared
by reacting the appropriate bromoquinoline with butyl
lithium in an appropriate solvent such as THF at -70~C to
0~C, preferably at -50~C, and then reacting the lithiated
compound with
CH3
R-C-N-OCH3
Il
~ (%IV)
wherein R is as described in Formula I. This reaction is
further specifically exemplified in Example 8. Compound
(XIV) can be prepared by a procedure set forth in
Tetrahedron Letters, 22, 3815 (1981).
M01329 -7-
CA 02214~33 1997-10-06
-
The compounds wherein R1 is C1-C6 alkyl or optionally
substituted Cl-C3 alkylphenyl are produced by subsequent
reaction of the co~ound of Formula I of either Reaction
Scheme l or Reaction Scheme 2 with sodium hydride and the
appropriate alkyl iodide or phenylalkyl iodide in
tetrahydrofuran according to procedures well known in the
art.
The following specific examples are presented to
illustrate the synthesis of the compounds of this
invention, but they should not be construed as limiting
the scope of this invention in any way.
EXAMPLE 1
l-Butyl-4-Ouinoline Methanol (III)
In a 1 liter, 3-necked flask equipped with a
mechanical stirrer, dropping funnel, reflux condenser (all
dried under argon), and thermometer, were placed 15.0
grams (0.0954 M) of 4-quinoline carboxaldehyde and 400 ml
of dry tetrahydrofuran (THF). The mixture was cooled by
means of stirring in a dry ice/methanol bath to -70~C.
Butylmagnesium chloride (lO0 ml of 2 M) was added through
the funnel at a fast drop rate over a period of about 45
minutes, and the mixture was allowed to stir at -70~C for
about an hour. Then, lO0 ml saturated ammonium chloride
(N~4Cl) was added dropwise through the funnel and the
2S mixture was allowed to warm to room temperature whereupon
the resulting semi-solid material was filtered off under
vacuum and washed with about lO0 ml T~F. The THF layers
were combined and washed with saturated sodium chloride
solution and then dried over magnesium sulfate. The
inorganic matter was filtered off by vacuum through
diatomaceous earth and the solvent evaporated. The
residue was flash chromatographed on silica (l:l
ethylacetate/hexane) and, after evaporation of the
solvent, about 5.0 gram of purified title compound was
3 5 recovered.
M01329 ~3~
CA 02214~33 1997-10-06
EXAMPLE 2
1-(4-Ouinolinyl)-l-Pentanone (IV)
In a 1 liter, 3-necked flask equipped with a
mechanical stirrer, dropping funnel, reflux condenser (all
dried under argon), and thermometer, were placed 50 ml of
dry dichloromethane and 3.79 ml (0.043 M) oxalyl chloride.
The resulting mixture was stirred in a dry ice/methanol
bath to maintain a temperature of -70~C. Methyl sulfoxide
(6.17 ml, 0.043 M) was added dropwise and subsequently a
solution of 9.26 grams (0.043 M) of the compound of
~ Example 1 in dry dichloromethane (CE2Cl2) was added and the
mixture allowed to stir cold for about 15 minutes.
Triethylamine (35.6 ml) was then added and the mixture was
allowed to stir cold for about 1 hour. After the mixture
lS had been allowed to warm to room temperature, it was
poured into a flask containing about 600 ml water. The
CH2C12 layer was separated and the aqueous layer extracted
with C~2C12 (2 times, 100 ml each). The combined C~2C12
layers were washed with saturated sodium chloride and
dried over magnesium sulfate. The inorganic matter was
filtered off and the solvent evaporated leaving a residue
that was ~lash chromatographed as in Example 1.
Evaporation left 9.0 grams of title compound.
EXAMPLE 3
1-(4-Quinolinyl)-l-Pentanone Oxime (V)
In a 500 ml, 3-necked flask equipped with a mechanical
stirrer, dropping funnel, reflux condenser (all dried
under argon), were placed 8.3 grams (0.03892 M) of the
compound of Example 2, 4.12 grams (0.0584 M) of
hydroxylamine hydrochloride, 40 ml of dry pyridine, and
about 200 ml of dry ethanol. The mixture was refluxed for
6 hours, then the solvent was evaporated leaving a residue
which was treated with about 400 ml ether and 200 ml
water. The ether layer was separated and washed several
times with water, washed with saturated sodium chloride
and dried over magnesium sulfate. The inorganic matter
M01329 -9-
CA 02214~33 1997-10-06
was filtered off and the solvent evaporated, leaving 8.42
grams (94.7%) of the title compound.
EXAMPLE 4
1-(4-Ouinolinyl)-l-Pent~n~P-O-l(4- Methylphenyl)Sulfonyl]
Oxime (VI)
In a 2~0 ml erhlenmeyer flask filled with argon were
placed 8.42 grams (0.0369 Ml of the compound of Example 3
and about 130 ml dry CH2Cl2. While stirring and cooling to
about 0~C in an ice/methanol bath, about 20 ml of
triethylamine was added over a ~ minute period, then 10.55
grams (0.0554 M) toluenesulfonyl chloride was added and
the mixture allowed to stir for 3 hours. The solution was
then evaporated to dryness which left a residue that was
treated with ether and water. The ether phase was
separated and the water phase extracted twice more with
ether. The combined ether layers were extracted with
dilute sodium hydroxide, washed with saturated sodium
chloride and dried over magnesium sulfate. The inorganic
matter was filtered off using vacuum, and the solvent was
evaporated leaving 15.1 grams of the title compound.
EXAMPLE 5
2-Amino-1-(4-Quinolinyl)-l-Pentanone (VII)
In a 250 ml, 3-necked flask equipped with a mechanical
stirrer, dropping funnel, reflux condenser (all dried
under argon), was placed 60 ml dry ethanol. While
stirring, 2.~5 grams ~0.111 M) of sodium spheres were
added and allowed to continue to stir under argon until
the sodium dissolved. A solution of 15.1 grams of the
compound of Example 4 in ethanol was then added and the
mixture stirred for 4 hours at room temperature. The
mixture was then poured into a flask containing 1200 ml
absolute ether. The resulting precipitate was filtered
off under vacuum through diatomaceous earth, and the
filtrate extracted with 2N hydrochloric acid (3 times, 170
ml each). The extract was evaporated leaving 19.8 grams
of the title compound.
M01329 -10-
CA 02214533 1997-10-06
EXAMP~E 6
N-[2-Oxo-l-Propyl-2-(4-Quinolinyl)Ethyll-l~-Imidazole-l-
Carboxamide (VlIIb)
The compound of Example 5 (19.8 grams) was dissolved
S in about 300 ml water, and the solution filtered by
gravity into a 1 liter, 3-necked flask equipped with a
mechanical stirrer and a thermometer. The solution was
cooled to 0~C with stirring in an ice/methanol bath, and
29.87 grams (0.185 M) l,l'-carbonyldiimidazole was added
over a 5 minute period. The mixture was allowed to stir
cold for about 15 minutes. The resulting precipitate was
taken up in about 500 ml ethyl acetate and separated from
the water. The solution was washed with saturated sodium
chloride and dried over magnesium sulfate, and the
inorganic matter filtered off using diatomaceous earth
under vacuum. The solvent was evaporated leaving the
title compound.
EXAMPLE 7
4-Propyl-5-(4-Quinolinyl)-1-(3~)-Oxazolone (I)
The compound of Example 6 (12 grams) was heated under
vacuum to 170~C for about 30 minutes, allowed to cool to
room temperature and washed with water. The water was
decanted and the residue was treated with C~2C12 (20 ml).
The CH2Cl2 was evaporated leaving 7.8 grams of residue.
The product was purified by means of flash chromatography
on silica, elutin~ with ethylacetate. The solvent was
evaporated and the residue dissolved in 48 ml hot 50%
ethanol, filtered and allowed to cool to room temperature.
The precipitate was collected by vacuum filtration and
dried inuacuo at 78~C, leaving 1.97 grams (21~) title
compound.
M.p. 188-190~C dec.; analysis calced. for Cl5~l4N2O2: C,
70.85; H, 5.55; N, 11.02; analysis found: C, 71.10; ~,
5.73; N, 10.76.
.
X01329 -11-
CA 02214~33 1997-10-06
EXAMPLE 8
1-(3-Quinolinyl)-l-butanone
In a dry 3-necked flask under argon at -50~C, n-butyl
lithium (0.0025 M, 0.021 ml) was added to 150 ml
diethyle~her. Then 4.16 grams 3-bromoquinoline in 2 ml
T~F was added dropwise while stirring and maintaining the
temperature at -60~C to -55~C. The solution was stirred
for 30 minutes, and 2.3 grams N-methyl-N-methoxybutanamide
were then added dropwise at -50~C and the solution was
stirred an additional 30 minutes. The solution was then
allowed to warm to 0~C and stirred for one hour. The
reaction was quenched with a saturated solution of
ammonium chloride and the T~F layer separated, washed with
brine, separated, and dried over magnesium sulfate.
Filtration through diatomaceous earth, followed by
concentration and subsequent thin layer chromatography
(35% ethylacetate/65% C~2C12) gave a total yield of 2.03 g
(51%) of the title compound.
By substituting the following starting materials for
the 4-quinoline carboxaldehyde and/or the butylmagnesium
chloride of Example 1, and following the procedures set
forth in Examples 1 through 7, the following end products
can be made in a like manner.
A. 6- or 8-methoxy-4-quinoline carboxaldehyde and
methylmagnesium chloride, to yield 5-(6- or 8-methoxy-
4-quinolinyl)-1-(3H)-oxazolone
B. 2-quinololine carboxaldehyde and methylmagnesium
chloride, to yield 5-(2-quinolinyl)-1-(3H)-oxazolone
C. 7- or 8-chloro-4-quinoline carboxaldehyde and
propylmagnesium chloride, to yield 4-ethyl-S-(7- or 8-
chloro-4-quinolinyl)-1-(3~)-oxazolone
D. 6,8-dichloro or dibromo-4-quinoline carboxaldehyde and
butylmagnesium chloride, to yield 4-propyl-5-(6,8-
dichloro or dibromo-4-quinolinyl)-1-(3~)-oxazolone
M01329 -12-
CA 02214~33 1997-10-06
E. 7- or 8-nitro-4-quinoline carboxaldehyde and
pentylmagnesium chloride, to yield 4-butyl-5-(7- or 8-
nitro-4-quinolinyl)-1-(3H)-oxazolone
F. 7-trifluoromethyl-4-quinoline carboxaldehyde and
hexylmagnesium chloride, to yield 4-pentyl-5-(7-
trifluoromethyl-4-quinolinyl)-l-(3H)-oxazolone
G. 5,8-dimethoxy-4-quinoline carboxaldehyde and
benzylmagnesium chloride, to yield 4-phenyl-5-(5,8-
dimethoxy-4-quinolinyl)-l-(3H)-oxazolone
H. 5,8-dimethoxy-6-nitro-4-quinoline carboxaldehyde and
ethylmagnesium chloride, to yield 4-methyl-5-(5,8-
dimethoxy-6-nitro-4-quinolinyl)-1-(3H)-oxazolone
I. 6-methoxy-8-nitro-4-quinoline carboxaldehyde and
propylmagnesium chloride, to yield 4-ethyl-5-(6-
lS methoxy-8-nitro-4-quinolinyl)-l-(3H)-oxazolone
J. 5,6-dimethoxy-8-nitro-4-quinoline carboxaldehyde and
pentylmagnesium chloride, to yield 4-butyl-5-(5,6-
dimethoxy-8-nitro-4-quinolinyl)-l-(3H)-oxazolone
K. 5-methyl-4-quinoline carboxaldehyde and
benzylmagnesium chloride, to yield 4-phenyl-5-(5-
methyl-4-quinolinyl)-1-(3H)-oxazolone
L. 2-(4-methoxy)phenyl-4-quinoline carboxaldehyde and
3,5-dimethoxybenzymagnesium chloride, to yield 4-(3,5-
dimethoxyphenyl)-5-[l-(4-methoxyphenyl)-4-quinolinyl]
1-(3H)-oxazolone
M. 6,8-dimethoxy-4-quinoline carboxaldehyde and 4-
methylbenzylmagnesium chloride, to yield 4-(4-
methylphenyl)-5-(6,8-dimethoxy-4-quinolinyl)-l-(3H)-
oxazolone
By substituting l-(3-quinolinyl)-1-pentanone for the
compound of Example 2 and by following the procedure set
forth in Examples 3 through 7, 4-propyl-5-(3-quinolinyl)-
(3H)-oxazolone is produced.
In a like manner, by substituting the following
~ 35 starting materials for 1-(4-quinolinyl)-1-pentanone of
Example 2 and following the procedure set forth in the
M01329 -13-
CA 02214~33 1997-10-06
preceding paragraph, the following end products can be
made.
N. 1-(5-quinolinyl)-1-pentanone, to yield 4-propyl-5-(5-
quinolinyl)-l-(3H)-oxazolone
O. 1-(6-quinolinyl)-1-butanone, to yield 4-ethyl-5-(6-
quinolinyl)-l-(3H)-oxazolone
P. 1-(7-quinolinyl)-1-ethanone, to yield 5-(7-
quinolinyl)-l-(3~)-oxazolone
Q. 1-~8-quinolinyl)-1-phenylethanone, to yield 4-phenyl-
5-(8-quinolinyl)-1-(3~)-oxazolone
R. 1-(5,8-dimethoxy-3-quinolinyl)-1-propanone, to yield
4-methyl-5-(5,8-dimethoxy-3-quinolinyl)-1-(3H)-
oxazolone
The compounds of this invention are useful both in the
free base form and as salts. The expression
"pharmaceutically-acceptable salt" means any organic or
inorganic addition salt of the base compounds of Formula I
which are relatively non-toxic and innocuous to a patient
at concentrations consistent with effective activity so
that the side effects ascribable to the salt do not
vitiate the beneficial effects of the base compounds of
Formula I. These salts are included within the scope of
this invention. Such salts include alkali metal salts,
such as sodium and potassium salts and alkaline earth
metal salts, such as calcium and magnesium salts; and the
like. Also salts with organic and inorganic acids can be
prepared, such as, for example, those formed with the
following acids: hydrochloric, hydrobromic, sulfonic,
sulfuric, phosphoric, nitric, ascorbic, methanesulfonic,
acetic, propionic, tartaric, citric, lactic, malic,
mandelic, cinnamic, palmitic, itaconic, fumaric,
benzenesulfonic and toluenesulfonic. The non-toxic,
physiologically acceptable salts are preferred, although
other salts are also useful, for example, in isolating or
purifying the product.
M01329 -14-
CA 02214~33 1997-10-06
The salts can be formed by conventional means such as
by reacting the free acid or free base forms of the
product with one or more equivalents of the appropriate
base or acid in a solvent or medium in which the salt is
insoluble, or in a solvent such as water which is then
removed in uacuo or by freeze-drying, or by exchanging the
cations of an existing salt for another cation on a
suitable ion exchange resin.
The compounds of Formula I are antihypertensive
agents, useful for lowering blood pressure. The utility
of the compounds of Formula I as antihypertensive agents
may be determined by a procedure wherein male,
spontaneously-hypertensive rats are monitored for blood
pressure changes by means of a tail-cuff technique
described by R. C. Dage, et al, in J. Cardiovasc.
Pharmacol., 3, 299-315, 1981. Blood pressure lowering in
spontaneously hypertensive rats over time, effectuated by
a 50 milligram per kilogram (mg/kg) interperitoneally
administered dose of a compound of Formula I, is presented
in Ta~le I below.
TABLE I
Blood Pressure (mm Hq) Chanqe From Control At Time After
Treatment
Test
25 Compound Control Chanqe in Blood Pressure
1 hr. 2 hr. 3 hr. 4 hr.
Carrier 201+/-3 -~+/-4 -2+/-6 -6+/-6 -10+/-5
1 209+/-7 -6+/-9 *-24+/-7 *-26+/-4 -25+/-6
Compound 1 : 4-propyl-5-(4-quinolinyl)-3(H)-oxazolone
*: significant effect p<0.05
M01329 -15-
CA 02214~33 1997-10-06
A patient, for the purpose of this invention, is a
mammal, including a human, in need of treatment for a
particular condition, injury or disease. The amount of
active ingredient (i.e., a compound of Formula I) to be
administered to a patient for the treatment of
hypertension can vary widely according to such
considerations as the particular compound and dosage unit
employed, the period of treatment, the age and sex of the
patient treated, and the extent of the hypertension
treated.
The total amount of active ingredient to be
administered intravenously will generally range from about
0.1 mg/kg to 30 mg/kg and preferably from 1.0 mg/kg to
10.0 mg/kg. A unit dosage may contain from 5 mg to 525 mg
of active ingredient, and can be taken one or more times
per day. For example, a 50 kg patient may be administered
S0 m~ - 700 mg active ingredient four times a day for a
total dose of 200 mg - 2800 mg per day.
The total amount of active ingredient to bç
administered orally will generally range from 0.1 mg/kg to
100 mg/kg, and preferably from 1.0 mg/kg to 50 mg/kg. A
unit dosage may contain from 5 mg to 1000 mg of active
ingredient, and can be taken one or more times per day.
For example, a S0 kg patient may be administered S0 mg -
2500 mg of active ingredient four times a day for a totalof 200 mg - 10,000 mg per day.
The compounds of this invention can be administered as
the sole anti-hypertensive agent or in combination with
other anti-hypertensive agents and/or diuretic agents
and/or calcium entry blocking agents. For example, the
compounds of this invention can be given in combination
with such compounds as benzthiazide, clonidine,
deserpidine, furosemide, hydralazine hydrochloride,
indacrinone and variable ratios of its enantiomers,
M01329 -16-
CA 02214~33 1997-10-06
prazosin, propranolol, reserpine, and the like, as well as
admixtures and combinations thereof.
Typically, the individual daily dosages for these
combinations can range from about one fifth of the
minimally recommended clinical dosages to the maximum
reco~m~nded levels for the entities when they are given
singly.
When the compounds of this invention are administered
as a bronchodilatory agents in the treatment of, for
example, asthma, the amount of active ingredient to be
administered can vary widely according to such
considerations as the particular compound and dosage unit
employed, the period of treatment, the age and sex of the
patient treated, and the extent of the condition treated.
The total amount of active ingredient to be administered
parenterally or by inhalation will generally range from
about 0.1 mg/kg to 30.0 mg/kg and preferably from l mg/kg
to 10 mg/kg. A unit dosage may contain from 5 mg to 525
mg of active ingredient, and can be taken one or more
times per day. For example, a 50 kg patient may be
administered 50 mg to 700 mg active ingredient, four times
a day for a total dose of 200 mg-2800 mg per day.
The compounds of this invention can be utilized to
achieve the desired pharmacological effect by
administration to a patient in need thereof in an
appropriately formulated pharmaceutical composition.
Therefore, the present invention includes pharmaceutical
compositions which are comprised of a pharmaceutically-
acceptable carrier and a pharmaceutically-effective amount
of a compound of Formula I. A pharmaceutically-acceptable
carrier is any carrier which is relatively non-toxic and
innocuous to a patient at concentrations consistent with
effective activity of the active ingredient so that any
side effects ascribable to the carrier do not vitiate the
beneficial effects of the active ingredient. A
M01329 -17-
CA 02214~33 1997-10-06
pharmaceutically-effective amount of compound is that
amount which produces a result or exerts an influence on
the particular condition being treated. The compounds of
Formula I can be administered with a pharmaceutically-
acceptable carrier using conventional dosage unit formsorally, parenternally, topically, as an aerosol, or the
like.
For oral administration the compounds can be
formulated into solid or liquid preparations such as
capsules, pills, tablets, troches, lozenges, melts,
powders, solutions, suspensions, or emulsions and may be
prepared according to methods known to the art for the
manufacture of pharmaceutical compositions. The solid
unit dosage forms can be a capsule which can be of the
ordinary hard- or soft-shelled gelatin type containing,
for example, surfactants, lubricants, and inert fillers
such as lactose, sucrose, calcium phosphate, and
cornstarch.
In another embodiment, the compounds of this invention
may be tableted with conventional tablet bases such as
lactose, sucrose, and cornstarch in combination with
binders such as acacia, cornstarch, or gelatin,
disintegrating agents intended to assist the break-up and
dissolution of the tablet following administration such as
potato starch, alginic acid, corn starch, and guar gum,
lubricants intended to improve the flow of tablet
granulations and to prevent the adhesion of tablet
material to the surfaces of the tablet dies and punches,
for example, talc, stearic acid, or magnesium, calcium, or
zinc stearate, dyes, coloring agents, and flavoring agents
intended to enhance the aesthetic qualities of the tablets
and make them more acceptable to the patient. Suitable
excipients for use in oral liquid dosage forms include
diluents such as water and alcohols, for example, ethanol,
benzyl alcohol, and the polyethylene alcohols, either with
M01329 -18-
CA 02214~33 1997-10-06
or without the addition of a pharmaceutically acceptably
surfactant, suspending agent, or emulsifying agent.
The compounds of this invention may also be
administered parenterally, that is, subcutaneously,
intravenously, intramuscularly, or interperitoneally, as
injectable dosages of the compound in a physiologically
acceptable diluent with a pharmaceutical carrier which can
be a sterile li~uid or mixture of liquids such as water,
saline, a~ueous dextrose and related sugar solutions, an
alcohol such as ethanol, isopropanol, or hexadecyl
alcohol, glycols such as propylene glycol or polyethylene
glycol, glycerol ketals such as 2,2-dimethyl-1,3-
dioxolane-4-methanol, ethers such as poly(ethyleneglycol)
400, an oil, a fatty acid, a fatty acid ester or
glyceride, or an acetylated fatty acid glyceride with or
without the addition of a pharmaceutically acceptable
surfactant such as a soap or a detergent, suspending agent
such as pectin, carbomers, methylcellulose,
hydroxypropylmethylcellulose, or carboxymethylcellulose,
or emulsifying agent and other pharmaceutically adjuvants.
Illustrative of oils which can be used in the
parenteral formulations of this invention are those of
petroleum, animal, vegetable, or synthetic origin, for
example, peanut oil, soybean oil, sesame oil, cottonseed
oil, corn oil, olive oil, petrolatum, and mineral oil.
Suitable fatty acids include oleic acid, stearic acid, and
isostearic acid. Suitable fatty acid esters are, for
example, ethyl oleate and isopropyl myristate. Suitable
soaps include fatty alkali metal, ammonium, and
triethanolamine salts and suitable detergents include
cationic detergents, for example, dimethyl dialkyl ammonium
halides, alkyl pyridinium halides, and alkylamines
acetates; anionic detergents, for example, alkyl, aryl,
and olefin sulfonates, alkyl, olefin, ether, and
monoglyceride sulfates, and sulfosuccinates; nonionic
detergents, for example, fatty amine oxides, fatty acid
M01329 -19-
CA 02214~33 1997-10-06
alkanolamides, and polyoxyethylenepolypropylene
copolymers; and amphoteric detergents, for example, alkyl-
beta-aminopropionates, and 2-alkylimidazoline quaternary
ammonium salts, as well as mixtures.
The parenteral compositions of this invention will
typically contain from about O.S~ to about 25~ by weight
of the active ingredient in solution. Preservatives and
buffers may also be used advantageously. In order to
minimize or eliminate irritation at the site of injection,
such compositions may contain a non-ionic surfactant
having a hydrophile-lipophile balance (~LB) of from about
12 to about 17. The quantity of surfactant in such
formulations ranges from about 5% to about 15~ by weight.
The surfactant can be a single component having the above
lS HLB or can be a mixture of two or more components having
the desired HLB.
Illustrative of surfactants used in parenteral
formulations are the class of polyethylene sorbitan fatty
acid esters, for example, sorbitan monooleate and the high
molecular weight adducts of ethylene oxide with a
hydrophobic base, formed by the condensation of propylene
oxide with propylene glycol.
The pharmaceutical compositions may be in the form of
sterile injectable aqueous suspensions. Such suspensions
may be formulated according to known methods using
suitable dispersing or wetting agents and suspending
agents such as, for example, sodium carboxymethyl-
cellulose, methylcellulose, hydroxypropylmethyl-cellulose,
sodium alginate, polyvinylpyrrolidone, gum tragacanth and
gum acacia; dispersing or wetting agents which may be a
naturally-occurring phosphatide such as lecithin, a
condensation product of an alkylene oxide with a fatty
acid, for example, polyoxyethylene stearate, a
condensation product of ethylene oxide with a long chain
aliphatic alcohol, for example, heptadecaethyleneoxy-
M01329 -20-
CA 02214~33 1997-10-06
cetanol, a condensation product of ethylene oxide with a
partial ester derived from a fatty acid and a hexitol such
as polyoxyethylene sorbitol monooleate, or a condensation
product of an ethylene oxide with a partial ester derived
5 from a fatty acid and a hexitol anhydride, for example,
polyoxyethylene sorbitan monooleate.
The suspensions may also contain one or more
preservatives, for example, ethyl or n-propyl p-hydroxy-
benzoate; one or more coloring agents; one or more
10 flavoring agents; and one or more sweetening agents such
as sucrose or saccharin.
Oily suspensions may be formulated by suspending the
active ingredient in a vegetable oil such as, for example,
arachis oil, olive oil, sesame oil or coconut oil, or in a
15 mineral oil such as liquid paraffin. The oily suspensions
may contain a thickening agent such as, for example,
beeswax, hard paraffin or cetyl alcohol. The sterile
injectable preparation may also be a sterile injectable
solution or suspension in a non-toxic parenterally-
20 acceptable diluent or solvent. Diluents and solvents thatmay be employed are, for example, water, Ringer's
solution, and isotonic sodium chloride solution. In
addition, sterile fixed oils are conventionally employed
as solvents or suspending media. For this purpose, any
25 bland, fixed oil may be employed including synthetic mono-
or diglycerides. In addition, fatty acids such as oleic
acid can be used in the preparation of injectables.
A composition of the invention may also be
administered in the form of suppositories for rectal
administration of the drug. ~hese compositions can be
prepared by mixing the drug with a suitable non-irritating
excipient which is solid at ordinary temperatures but
liquid at the rectal temperature and will therefore melt
in the rectum to release the drug. Such materials are,
for example, cocoa butter ~nd polyethylene glycol.
M01329 -21-
CA 02214~33 1997-10-06
Dispersible powders and granules are suitable for the
preparation of an aqueous suspension. They provide the
active ingredient in admixture with a dispersing or
wetting agent, a suspending agent and one or more
preservatives. Suitable dispersing or wetting agents and
suspending agents are exemplified by those already
mentioned above. Additional excipients, for example those
sweetening, flavoring, and coloring agents described
above, may also be present.
The compounds of this invention may be formulated as
solutions, suspensions, emulsions, powders, and semisolid
preparations administered as an aerosol preparation by
means of a pressurized aerosol container together with a
gaseous or liquefied propellant such as, for example,
dichlorodifluoromethane, dichlorodifluoromethane with
dichlorodifluoroethane, carbon dioxide, nitrogen, propane,
or the like, with the usual adjuvants such as co-solvents
and wetting agents, as may be necessary or desirable. The
compounds may also be administered in a non-pressurized
form such as in a nebulizer or atomizer. The aerosols are
intended for administration as fine, solid particles or as
liquid mists via the respiratory system, and the particle
size of aerosol preparations intended for administration
to the lungs should be below 50 micrometers, in most
instances.
The pharmaceutical compositions of the invention may
also be in the form of oil-in-water emulsions. The oily
phase may be a vegetable oil such as liquid paraffin or a
mixture of vegetable oils. Suitable emulsifying agents
may be (l) naturally-occurring gums such as gum acacia and
gum tragacanth, (2) naturally-occurring phosphatides such
as soy bean and lecithin, (3) esters or partial esters
derived from fatty acids and hexitol anhydrides, for
example, sorbitan monooleate, (4) condensation products of
said partial esters with ethylene oxide, for example,
M01329 -22-
CA 02214~33 1997-10-06
polyoxyethylene sorbitan monooleate. The emulsions may
also contain sweetening and flavoring agents.
Syrups and elixirs may be formulated with sweetening
agents such as, for example, glycerol, propylene glycol,
sorbitol or sucrose. Such formulations may also contain a
demulcent, and preservative and flavoring and coloring
agents.
The compositions of the invention can also contain
other conventional pharmaceutically-acceptable compounding
ingredients, generally referred to as carriers or
diluents, as necessary or desired. Any of the
compositions of this invention may be preserved by the
addition of an antioxidant such as ascorbic acid or by
other suitable preservatives. Conventional procedures for
preparing such compositions in appropriate dosage forms
can be utilized.
The following specific examples are presented to
illustrate compositions of this invention, but they should
not be construed as limiting the scope of this invention
in any way.
EXAMPLE 9
A tablet is prepared from 4-Methyl-5-(3-quinolinyl)-1-
(3H)-oxazolone 250 mg
Starch 40 mg
25 Talc 10 mg
Magnesium 10 mg
M01329 -23-
CA 02214~33 1997-10-06
~ '
EXAMPLE 10
A capsule is prepared from 4-phenyl-5-(2-quinolinyl)-
1-(3H)-oxazolone 400 mg
Talc40 mg
Sodium Carboxymethyl cellulose 40 mg
Starch 120 mg
The compounds of Formula I may also be utilized, in
free base form or in compositions, in research and
diagnostics, or as analytical references or standards, and
the like. Therefore, the present invention includes
compositions which are comprised of an inert carrier and
an effective amount of a compound of Formula I, or a salt
thereof. An inert carrier is any material which does not
interreact with the compound to be carried and which lends
support, means of conveyance bulk, traceable material, and
the like to the compound to be carried. An effective
amount of compound is that amount which produces a result
or exerts an influence on the particular procedure being
performed.
It should be apparent to one of ordinary skill in the
art that changes and modifications can be made to this
invention without departing from the spirit or scope of
the invention as it is set forth herein.
M01329 -24-
