A facile synthesis of 3,4-dimercaptofurans via sulfenylation of (E)-β-chlorovinyl ketones and 1,2-sulfur migration
作者:E. Song、H. Y. Kim、K. Oh
DOI:10.1039/c6ob02772e
日期:——
The one-pot sulfenylation of (E)-β-chlorovinyl ketones was investigated under soft α-vinyl enolization conditions. Modulating the nature of nucleophilic species using a “hard” base the regioselective formation of α,γ-dithio-allenyl ketones has been achieved, where the thermodynamic control was mimicked by the presence of Et3N·HCl. The sulfenylated products, α,γ-dithio-allenyl and α,α-dithio-propargyl
在软α-乙烯基烯醇化条件下研究了(E)-β-氯乙烯基酮的单锅亚磺酰基化。使用“硬”碱调节亲核物质的性质,已经实现了α,γ-二硫代-烯丙基酮的区域选择性形成,其中通过Et 3 N·HCl的存在来模拟热力学控制。亚磺酰化产物,α,γ-二硫代烯丙基和α,α-二硫代-炔丙基酮,通过新型的1,2-硫迁移,以优异的收率平稳地进行环异构化为3,4-二巯基呋喃。