发明名称 |
PROCESS FOR PREPARING 1-ALKYL-4-(2-CHLORO-3-ALKOXY-4-ALKYLSULFONYLBENZOYL)-5-HYDROXYPYRAZOLE AND RELATED COMPOUNDS |
摘要 |
Herbicidal 1-alkyl-4-(2-chloro-3-alkoxy-4-alkylsulfonylbenzoyl)-5-hydroxypyrazole compounds, as well as 1-halo-2-chloro-3-alkoxy-4-alkylsulfonylbenzene compounds and 2-chloro-3-alkoxy-4-alkylsulfonylbenzoic acid compounds, were prepared in good yield by the reaction of the corresponding 3-chloro compound with an alkali metal alkoxide compound. 1-Halo-2-chloro-3-alkoxy-4-alkylsulfonylbenzene and 1-halo-2,3-dichloro-4-alkylsulfonylbenzene compounds were converted to compounds having hydroxycarbonyl, alkoxycarbonyl, or 1-alkyl-5-hydroxypyrazole-4-carbonyl substituents in place of the 1-halo substituent by reaction with carbon monoxide and water, an alcohol, or a 1-alkyl-5-hydroxypyrazole compound, respectively, in the presence of a palladium II salt:trihydrocarbylphosphine complex type catalyst.
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申请公布号 |
CA2257889(A1) |
申请公布日期 |
1998.10.01 |
申请号 |
CA19982257889 |
申请日期 |
1998.03.24 |
申请人 |
DOW AGROSCIENCES LLC |
发明人 |
EMONDS, MARK V. M.;SIDDALL, THOMAS L.;KRUMEL, KARL L.;SCHOMAKER, JENNIFER M.;ZETTLER, MARK W. |
分类号 |
C07B61/00;C07C315/04;C07C317/14;C07C317/22;C07C317/44;C07C317/46;C07D231/20;(IPC1-7):C07D231/20;C07D335/02;C07D313/04;C07D337/04;C07D309/12;C07D405/12;C07D409/12;C07D307/20 |
主分类号 |
C07B61/00 |
代理机构 |
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地址 |
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