Propylene Glycol Cyclic Sulfate as a Substitute for Propylene Oxide in Reactions with Acetylides
作者:Roderick W. Bates、Tushar B. Maiti
DOI:10.1081/scc-120015819
日期:2003.1.4
Abstract Lithium acetylides react cleanly with propylene glycol cyclic sulfate to give, after acidic hydrolysis, homopropargylic alcohols in good yield. The benzyl and TBDPS protecting groups are stable to these conditions, but the THP, TBS, acetal and orthoester groups are not. The readily available (S)-cyclic sulfate gives the (S)-alcohol without loss of stereochemical integrity.
摘要 乙炔锂与丙二醇环硫酸酯反应干净,经酸性水解后可得到高收率的高炔丙醇。苄基和 TBDPS 保护基团在这些条件下是稳定的,但 THP、TBS、缩醛和原酸酯基团不是。容易获得的 (S)-环硫酸盐可在不损失立体化学完整性的情况下生成 (S)-醇。