A novel cyclodimerization of 3-methyl-3-butenenitrile. An efficient synthesis of 4-cyanoisophorone
作者:Kunihiko Takabe、Suguru Ohkawa、Toshio Sato、Gia Hien Tang、Takao Katagiri
DOI:10.1016/0040-4039(80)80206-1
日期:1980.1
Dimerization of 3-methyl-3-butenenitrile (1) by lithium dialkylamide gave selectively 3,5,5-trimethyl-1-amino-4-cyanocyclohexa-1,3-diene (2), which was easily hydrolyzed by aqueous acid to afford 4-cyanoisophorone (3,5,5-trimethyl-4-cyano-cyclohex-2-enone) (3) quantitatively.
3-甲基-3-丁烯腈(1)被二烷基酰胺锂二聚生成选择性的3,5,5-三甲基-1-氨基-4-氰基环己-1,3-二烯(2),很容易被酸水溶液水解为定量提供4-氰基异佛尔酮(3,5,5-三甲基-4-氰基-环己-2-烯酮)(3)。