A Simple Preparation of Cyclic Vinylic Bromides (1-Bromocycloalkenes and 1-Bromo-1,5-cyclooctadiene) from 1,2-Dibromocycloalkanes
作者:Balachandra S. Bandodakar、Gopalpur Nagendrappa
DOI:10.1055/s-1990-27031
日期:——
1,2-Dibromocyclopentane, 1,2-dibromocyclohexane, 1,2-dibromocycloheptane, 1,2-dibromocyclooctane, 1,2-dibromocyclododecane, and 5,6-dibromocyclooctene are smoothly dehydrobrominated to the corresponding 1-bromocycloalkenes in good yield using morpholine and dimethyl sulfoxide in benzene or ethanol.
1,2-二溴环戊烷、1,2-二溴环己烷、1,2-二溴环庚烷、1,2-二溴环辛烷、1,2-二溴环十二烷,以及5,6-二溴环辛烯在苯或乙醇中使用哌啶和二甲基亚砜进行平稳的脱溴反应,得到相应的1-溴环烯烃,产率良好。