作者:Andrés Molina Ponce、Larry E. Overman
DOI:10.1021/ja001975m
日期:2000.9.1
A variety of substituted 3-acyltetrahydrothiophenes can be prepared with high stereoselectivity in 50−70% yield by acid-promoted condensation of mercapto allylic alcohols 1 (X = S) with aldehydes and ketones. The mercapto allylic alcohol must be substituted at the internal alkene carbon and the terminal alkene carbon must be unsubstituted. This new synthesis of tetrahydrothiophenes will be most useful
通过巯基烯丙醇 1 (X = S) 与醛和酮的酸促进缩合,可以以 50-70% 的收率以高立体选择性制备各种取代的 3-酰基四氢噻吩。巯基烯丙醇的内部烯烃碳必须被取代,末端烯烃碳必须未被取代。这种四氢噻吩的新合成对于制备在 C2 和 C5 处具有顺式侧链的 3-酰基四氢噻吩最有用。在 (4R)-9 到四氢噻吩 22 的转化过程中对映体纯度的完全保持与环化-频哪醇途径一致(24 → 25 → 26 → 27,方案 8)。