1-(2-ACYLOXYETHYL)CYCLOPROPYL SULFONATE COMPOUND, 3-HALOMETHYL-3-BUTENYL CARBOXYLATE COMPOUND, AND METHOD FOR PRODUCING 4-ALKYL-3-METHYLENEBUTYL CARBOXYLATE
申请人:Shin-Etsu Chemical Co., Ltd.
公开号:US20160185708A1
公开(公告)日:2016-06-30
Provided is a simple, selective and efficient method for producing 4-alkyl-3-methylenebutyl carboxylates such as 7-methyl-3-methylene-7-octenyl propionate. More specifically, provided is, for example, a method for producing a 4-alkyl-3-methylenebutyl carboxylate compound, comprising an acyloxylation step of subjecting a 1-(2-haloethyl)cyclopropyl sulfonate compound (1) to acyloxylation to obtain a 1-(2-acyloxyethyl)cyclopropyl sulfonate compound (2), a halogenation step of subjecting the compound (2) to halogenation involving cyclopropyl-allyl rearrangement to obtain a 3-halomethyl-3-butenyl carboxylate compound (3), and a coupling step of subjecting the compound (3) to a coupling reaction with an organometallic reagent (4) to obtain the 4-alkyl-3-methylenebutyl carboxylate compound (5).
提供了一种简单、选择性和高效的方法,用于制备4-烷基-3-亚甲基丁基羧酸酯,例如7-甲基-3-亚甲基-7-辛烯基丙酸酯。更具体地说,提供了一种制备4-烷基-3-亚甲基丁基羧酸酯化合物的方法,包括以下步骤:将1-(2-卤乙基)环丙基磺酸酯化合物(1)进行酰氧化反应,得到1-(2-酰氧乙基)环丙基磺酸酯化合物(2);将化合物(2)进行卤原子化反应,通过环丙基-烯丙基重排反应得到3-卤甲基-3-丁烯基羧酸酯化合物(3);将化合物(3)与有机金属试剂(4)进行偶联反应,得到4-烷基-3-亚甲基丁基羧酸酯化合物(5)。