N-Thioaroylmorpholines in Silica Gel-Water: An Efficient System to Access Functionalized Allylic Thioesters from Baylis-Hillman Bromides
作者:Lal Yadav、Rajesh Patel、Vishnu Srivastava
DOI:10.1055/s-0030-1258476
日期:2011.4
A facile, one-pot synthesis of allylic thioesters starting from Baylis-Hillman (BH) bromides and N-thioaroylmorpholines is described. The synthesis is performed in a silica gel-water system without any additional catalyst or co-catalyst. The reaction pathway involves selective S-alkylation of N-thioaroylmorpholines via nucleophilic displacement (SN2) with BH bromides, followed by hydrolysis to afford
描述了从Baylis-Hillman(BH)溴化物和N-硫代芳酰基吗啉开始的一锅法合成烯丙基硫酯的方法。合成在硅胶-水系统中进行,无需任何其他催化剂或助催化剂。反应途径涉及选择性S-烷基化Ñ经由亲核置换(S -thioaroylmorpholines Ñ 2)BH溴化物,接着水解,得到相应的硫酯。本合成方案避免了使用可及性有限的恶臭硫化合物,例如硫醇,硫代酸及其盐作为反应物。 Baylis-Hillman加合物-水性介质-烯丙基硫酯-亲核取代-绿色化学-区域选择性