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(12) Patent: | (11) CA 1091255 |
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(21) Application Number: | 285808 |
(54) English Title: | PROCESS FOR THE PREPARATION OF 2,3-DICHLOROANISOLE |
(54) French Title: | OBTENTION DE 2,3-DICHLOROANISOLE |
Status: | Expired |
(52) Canadian Patent Classification (CPC): |
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(51) International Patent Classification (IPC): |
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(72) Inventors : |
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(73) Owners : |
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(71) Applicants : | |
(74) Agent: | GOWLING LAFLEUR HENDERSON LLP |
(74) Associate agent: | |
(45) Issued: | 1980-12-09 |
(22) Filed Date: | 1977-08-30 |
Availability of licence: | N/A |
(25) Language of filing: | English |
Patent Cooperation Treaty (PCT): | No |
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(30) Application Priority Data: | ||||||
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ABSTRACT OF THE DISCLOSURE
Sodium methylate is reacted in an aprotic polar
solvent or in a mixture of such solvents with 1,2,3-trichloro-
benzene in the presence of a cuprous catalyst and at temperatures
ranging between 70°C and the boiling temperature of the solvent
to produce 2,3-dichloroanisole which is useful in particular
for the preparation of 2,3-dichloro-4-(2-thenoyl) phenoxyacetic
acid - valuable diuretic and uricosuric agent.
Note: Claims are shown in the official language in which they were submitted.
Note: Descriptions are shown in the official language in which they were submitted.
Sorry, the representative drawing for patent document number 1091255 was not found.
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Title | Date |
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Forecasted Issue Date | 1980-12-09 |
(22) Filed | 1977-08-30 |
(45) Issued | 1980-12-09 |
Expired | 1997-12-09 |
There is no abandonment history.
Fee Type | Anniversary Year | Due Date | Amount Paid | Paid Date |
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Application Fee | $0.00 | 1977-08-30 |
Note: Records showing the ownership history in alphabetical order.
Current Owners on Record |
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ALBERT ROLLAND, S.A. |
Past Owners on Record |
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None |