Process for the preparation of compounds with a double carbon to carbon bond by dehydration of the corresponding alcohol
申请人:IMPERIAL CHEMICAL INDUSTRIES PLC
公开号:EP0235714A1
公开(公告)日:1987-09-09
Compounds of the formula
are prepared by heating an alcohol with the formula
in the presence of an alumina catalyst.
In these formulas R is C2-6 alkyl, X is halogen, Ci-5 alkyl, C1-4 alkoxy, halo-C1-4 alkyl, halo-C1-4 alkoxy, nitro, phenyl, phenoxy, benzyl, benzyloxy (optionally ring substituted with halogen), alkylenedioxy, haloalkylenedioxy, amino, mono or di C1-4 alkyl amino, hydroxy, morpholino (and carboxy and alkyl esters thereof), n is an integer having a value of 1, 2 or 3 and when n is 2 or 3 the substituents represented by X are the same or different.
式化合物
式的醇在氧化铝催化剂存在下加热制备。
的醇在氧化铝催化剂存在下加热制备。
在这些式子中,R 是 C2-6 烷基,X 是卤素、Ci-5 烷基、C1-4 烷氧基、卤代-C1-4 烷基、卤代-C1-4 烷氧基、硝基、苯基、苯氧基、苄基、苄氧基(可选择环状被卤素取代)、亚烷基二氧基、卤代亚烷基二氧基、氨基、单或双 C1-4 烷基氨基、羟基、吗啉基(及其羧基和烷基酯),n 为数值为 1、2 或 3 的整数,当 n 为 2 或 3 时,X 所代表的取代基相同或不同。