Catalyst-free synthesis of thiazolidines <i>via</i> sequential hydrolysis/rearrangement reactions of 5-arylidenethiazolidin-4-ones at room temperature
作者:Fanxun Zeng、Letian Zhang、Xusheng Shao、Zhong Li、Xiaoyong Xu
DOI:10.1039/c7ob02924a
日期:——
A catalyst-free sequential reaction involving hydrolysis and intramolecular aza-Michael addition was developed for synthesizing functionalized thiazolidines from 5-arylidenethiazolidin-4-ones at room temperature. A series of thiazolidine-5-carboxylic acids were prepared in good to excellent yields (up to 97% yield) and excellent diastereoselectivities (up to >20 : 1 dr). This methodology was applicable
开发了涉及水解和分子内氮杂-Michael加成反应的无催化剂顺序反应,用于在室温下从5-芳基吡喃唑啉-4-酮合成官能化的噻唑烷。制备了一系列噻唑烷-5-羧酸,具有良好至优异的产率(高达97%的产率)和优异的非对映选择性(高达> 20:1 dr)。该方法可用于构建噻虫啉和氟噻吩的高收率衍生物。