SYNTHESIS OF α,β-UNSATURATED ALDEHYDES BY MEANS OF 3-METHOXY-1-PHENYLTHIO-1-PROPENE
作者:Makoto Wada、Hideo Nakamura、Takeo Taguchi、Hisashi Takei
DOI:10.1246/cl.1977.345
日期:1977.4.5
obtained by the reaction of 1-phenylthio-2,3-epoxypropane (1) with sodium hydride in tetrahydrofuran (THF) and successive treatment with methyl iodide, was lithiated with lithium diisopropylamide at −78°C. The lithio derivative reacted with alkyl halides regioselectively at the α-position of sulfur atom, and hydrolysis of the products at room temperature in the presence of mercuric chloride afforded the
3-甲氧基-1-苯硫基-1-丙烯 (3),通过 1-苯硫基-2,3-环氧丙烷 (1) 与氢化钠在四氢呋喃 (THF) 中的反应和甲基碘连续处理获得,用锂化-78°C 下的二异丙基氨基锂。锂硫衍生物与卤代烷在硫原子的α-位发生区域选择性反应,产物在室温下在氯化汞存在下水解得到相应的α,β-不饱和醛,收率良好。