(<i>Z</i>)-Tetrahydrothiophene and (<i>Z</i>)-tetrahydrothiopyran synthesis through nucleophilic substitution and intramolecular cycloaddition of alkynyl halides and EtOCS<sub>2</sub>K
作者:Xianglin Luo、Yibiao Li、Xiuwen Chen、Zhiyan Song、Junyi Liang、Chunshu Liao、Zhongzhi Zhu、Lu Chen
DOI:10.1039/c9ob01370a
日期:——
This protocol provides a novel, environmentally friendly and simple method for the synthesis of (Z)-tetrahydrothiophene derivatives using the nucleophilic thiyl radical intramolecular cycloaddition cascade process to construct C-S bonds under transition-metal-free conditions. This transformation process offers a broad substrate scope, good functional group tolerance, and excellent stereoselectivity
该协议提供了一种新颖的,环境友好的简单方法,用于使用无核金属的噻吩基分子内环加成级联过程合成(Z)-四氢噻吩衍生物,以在无过渡金属的条件下构建CS键。该转化过程提供了广泛的底物范围,良好的官能团耐受性和出色的立体选择性(Z / E比率高达99/1)。此外,该方法使用无味,稳定且廉价的EtOCS2K作为硫源。