发明名称 |
PREPARATION OF SUBSTITUTED CYCLOPROPANE CARBOXYLIC ACIDS AND ESTERS |
摘要 |
Process for the preparation of 1-lower alkoxycarbonyl-3-( beta , beta -dichlorovinyl)-2,2-dimethylcyclopropanes from the corresponding 1-cyano-1-carboxylic acid ester by hydrolysis, decarboxylation of the free carboxylic acid, reaction of the cyclopropane nitrile with a lower aliphatic alcohol and anhydrous hydrogen chloride, followed by alcoholysis or hydrolysis of the reaction product so obtained to give the desired ester or carboxylic acid. Includes a method for the separation of essentially pure cis- and trans-isomers from the mixed nitriles. The products are useful intermediates for the preparation of pyrethroid insecticides. |
申请公布号 |
AU515385(B2) |
申请公布日期 |
1981.04.02 |
申请号 |
AU19770030480 |
申请日期 |
1977.11.09 |
申请人 |
IMPERIAL CHEMICAL INDUSTRIES LTD. |
发明人 |
ROBERT JOSEPH LINDSAY;IAN FERGUSON;ALAN THOMAS COSTELLO |
分类号 |
C07C69/743;B01J27/02;B01J27/08;B01J31/00;B01J31/04;C07B61/00;C07C;C07C51/00;C07C51/08;C07C51/09;C07C61/40;C07C67/00;C07C67/22;C07C69/74;C07C253/00;C07C255/48 |
主分类号 |
C07C69/743 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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