申请人:Schin-Etsu Chemical Co., Ltd.
公开号:US04391984A1
公开(公告)日:1983-07-05
The invention provides a novel method for the synthetic preparation of an .omega.-haloalkyne compound of the general formula R--C.tbd.C--CH.sub.2).sub.n X, in which X is a halogen atom, R is a monovalent hydrocarbon group and n is 4, 5 or 6, by the coupling reaction of a Grignard reagent RMgX' and an .omega.-halo-1-bromoalkyne compound of the formula X--CH.sub.2).sub.n C.tbd.C-Br. The .omega.-haloalkyne compound obtained in the above can be readily converted to the corresponding alkenyl acetate of the formula R--CH.dbd.CH--CH.sub.2).sub.n OCOCH.sub.3 by first acetylating and then partially hydrogenating in the presence of a Lindlar catalyst. In particular, 7, 11-hexadecadienyl acetate, which is a sexual pheromone compound of a noxious insect, is obtained in the same route of synthesis starting with the Grignard reagent of a 1-halo-3-octene and 1, 8-dibromo-1-octyne.
该发明提供了一种新的方法,用于合成通式为R--C.tbd.C--CH.sub.2).sub.n X的.omega.-卤代炔烃化合物,其中X是卤素原子,R是一价碳氢基团,n为4、5或6,通过格氏试剂RMgX'和通式为X--CH.sub.2).sub.n C.tbd.C-Br的.omega.-卤代-1-溴代炔烃化合物的偶联反应。通过上述方法得到的.omega.-卤代炔烃化合物可以通过首先乙酰化然后在Lindlar催化剂存在下部分加氢,轻松转化为通式为R--CH.dbd.CH--CH.sub.2).sub.n OCOCH.sub.3的相应烯基醋酸酯。特别地,通过从1-卤代-3-辛烯和1,8-二溴代-1-辛炔的格氏试剂开始,可以在相同的合成路线中获得7,11-十六碳二烯基醋酸酯,这是一种有害昆虫的性信息素化合物。