Stereoselective synthesis of 2,5-dialkyl-3-(phenylsulfonyl) tetrahydrofurans via cyclisation of Z-Sulfonyl-substituted homoallylic alcohols
作者:Donald Craig、Neil J. Ikin、Neil Mathews、Alison M. Smith
DOI:10.1016/0040-4039(95)01524-8
日期:1995.10
Z-Sulfonyl-substituted homoallylicalcohols 3 underwent highly anti-selective basemediated 5-endo-trig cyclisation reactions to give 2,5-dialkyl-3-phenylsulfonyl tetrahydrofurans anti-2. A simple steric model is proposed to account for the high selectivities. Tetrahydrofuran 2g was efficiently and stereoselectively sulfenylated at the 3-position to give 6, which was subjected to an oxidation—syn-elimination