Observations on the alkylation of β-acetalic carbanions: monoalkylation versus dialkylation and elimination
作者:Roberto Ballini、Giovanna Bosica、Sergio Cossu、Ottorino De Lucchi、Paola Peluso
DOI:10.1016/s0040-4020(01)00378-7
日期:2001.5
The reaction with methyl iodide and a base (t-BuOK) of 1,3-dioxolanes and 1,3-dithiolanes substituted at the β-position with an electron-withdrawing substituent (EWG=CO2Me, SO2Ph, SO2Ph-p-NO2, SO2Ph-o-NO2) leads to mono- or dialkylated or ring-opened products in good yield.
用甲基碘进行反应和碱(吨在取代的1,3-二氧戊环和1,3-二硫戊-BuOK)β位上具有吸电子取代基(EWG =CO 2 Me中,SO 2 PH, SO 2 PH- p -NO 2,SO 2 PH- Ô -NO 2)导致单或二烷基化或开环产物以良好的收率。