A process for making vicinal epoxides and alkyl halides or alkylene dihalides from carbonate esters
申请人:THE DOW CHEMICAL COMPANY
公开号:EP0060904A1
公开(公告)日:1982-09-29
A process for preparing a vicinal epoxide and an alkyl halide or alkylene dihalide, by reacting a carbonate ester of the formula
or
wherein R' to R4 and R6 to R9 are each hydrogen, a hydrocarbon group and -CH2X, R5 is alkyl, R6 to R9 can each be -CH2Y, and each of the pairs R', R2 and R6, R7 may together form an alkylene group of 3-6 carbon atoms, each X is Cl or Br, and Y is an alkoxy or aroxy group, with a quaternary ammonium or phosphonium salt catalyst.
一种制备沧醛环氧化物和烷基卤化物或亚烷基二卤化物的工艺,其方法是使式 如下的碳酸酯反应
或
其中 R' 至 R4 和 R6 至 R9 各为氢、烃基和-CH2X,R5 为烷基,R6 至 R9 可各为-CH2Y,R'、R2 和 R6、R7 各对可共同形成 3-6 个碳原子的亚烷基,各 X 为 Cl 或 Br,Y 为烷氧基或丙氧基,与季铵盐或鏻盐催化剂反应。