NaOH-Promoted Thiolysis of Oxiranes Using 2-[Bis(alkylthio)methylene]-3-oxo-<i>N</i>-<i>o</i>-tolylbutanamides as Odorless Thiol Equivalents
作者:Dewen Dong、Qun Liu、Haifeng Yu、Yan Ouyang、Yan Wang
DOI:10.1055/s-2006-958438
日期:2007.1
A convenient and efficient protocol for the thiolysis of oxiranes using 2-[bis(alkylthio)methylene]-3-oxo-N-o-tolylbutan-amides as thiol equivalents has been developed. Promoted by sodium hydroxide (NaOH) in ethanol at room temperature, the cleavage commences and the generated thiolate anions undergo nucleophilic addition in situ. β-Hydroxy sulfides were obtained in high yields along with good (3-regioselectivity
使用 2-[双(烷硫基)亚甲基]-3-氧代-No-tolylbutan-酰胺作为硫醇等价物对环氧乙烷进行硫解的方便有效的协议已经开发出来。在室温下在乙醇中的氢氧化钠 (NaOH) 的促进下,裂解开始,生成的硫醇阴离子进行原位亲核加成。β-羟基硫化物以高收率和良好的(3-区域选择性)获得,并且还分离出反式β-羟基硫化物。一种α,β-环氧酮产物与硫醇等价物的硫解得到相应的α-羰基在所有情况下,硫醇等价物的前体 3-oxo-No-tolylbutanamide 都可以作为副产物以高产率在新的硫解过程中回收。