发明公开
EP0038052A1 Method for the preparation of cis-alkenyl bromide and acetate
失效
Verfahren zur Herstellung von cis-Alkenylbromid und -azetat。
- 专利标题： Method for the preparation of cis-alkenyl bromide and acetate
- 专利标题（中）： Verfahren zur Herstellung von cis-Alkenylbromid und -azetat。
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申请号： EP81102780.4申请日： 1981-04-10
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公开(公告)号： EP0038052A1公开(公告)日： 1981-10-21
- 发明人: Yamamoto, Akira , Ishihara, Toshinobu , Taguchi, Kenichi
- 申请人： Shin-Etsu Chemical Co., Ltd.
- 申请人地址： 6-1, Otemachi 2-chome Chiyoda-ku Tokyo 100 JP
- 专利权人： Shin-Etsu Chemical Co., Ltd.
- 当前专利权人： Shin-Etsu Chemical Co., Ltd.
- 当前专利权人地址： 6-1, Otemachi 2-chome Chiyoda-ku Tokyo 100 JP
- 代理机构： Jaeger, Klaus, Dipl.-Chem. Dr.
- 优先权： JP48933/80 19800414; JP48934/80 19800414
- 主分类号： C07C21/14
- IPC分类号： C07C21/14 ; C07C69/145 ; C07C17/26 ; C07C67/11
摘要：
A novel and improved synthetic route for the preparation of several kinds of cis-alkenyl acetates of the formula RCH=CHCH 2 CH 2 [CH 2 ] n OCOCH 3 , in which R is an alkyl group having from 1 to 8 carbon atoms and n is a positive integer from 1 to 10, which compounds are known as sexual pheromone compounds of various noxious insects utilizable as a powerful means for the extermination of the insects, is proposed. The inventive method comprises cross coupling reaction of a Grignard reagent of a cis-alken-3-yl chloride of the formula RCH= CHCH 2 CH 2 Cl with an α, ω -dibromoalkane of the formula Br(CH 2 ) n Br to form a cis-alkenyl bromide of the formula RCH=CHCH 2 (CH 2 ) n Br which is further reacted with an alkali metal acetate.
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