An efficient reagent for synthesis of α,β-unsaturated aldehydes 3-methylthio-2-propenyl p-tolyl sulfone
作者:Katsuyuki Ogura、Teruyuki Iihama、Kazumasa Takahashi、Hirotada Iida
DOI:10.1016/s0040-4039(01)81259-4
日期:1984.1
Alkylation of 3-methylthio-2-propenyl p-tolyl sulfone (1) with an alkyl halide and a base (NaH or KOH-TOMAC) took place at the position α to the sulfonyl group to give optionally a mono- or dialkylated product (2 or 3), which was converted to β-monosubstituted or β,β-disubstituted α,β-unsaturated aldehyde (6 or 7), respectively, by TiCl4-assisted hydrolysis followed by the removal of p-toluenesulfinic
3-甲硫基-2-丙烯基对甲苯基砜(1)与烷基卤和碱(NaH或KOH-TOMAC)的烷基在磺酰基的α位发生烷基化反应,任选生成单烷基或二烷基化产物( 2或3),其通过TiCl 4辅助水解分别转化为β-单取代或β,β-二取代的α,β-不饱和醛(6或7),然后除去对甲苯亚磺酸。