Tf<sub>2</sub>O/2-Chloropyridine-Triggered Synthesis of Benzo[<i>b</i>]thiophene 1,1-Dioxides from Sulfonium α-Acyl Sulfonylmethylides
作者:Duo Fu、Jiaxi Xu
DOI:10.1021/acs.joc.3c02540
日期:2024.3.1
intermediates of sulfonium α-acyl sulfonylmethylides realize the efficient synthesis of 2-alkyl/arylthiobenzo[b]thiophene 1,1-dioxides. The deactivated sulfonyl group determines the site-selectivity of the electrophilic addition via the ipso-attack, while the following S-migration controls the regioselectivity. Some of 2-methylthiobenzo[b]thiophene 1,1-dioxides show fluorescence properties in the solid state and
三氟甲磺酸酐与2-氯吡啶共介串联活化、分子内芳香族亲电加成以及α-酰基磺酰甲基锍螺环中间体的1,2-磺酰基转移实现了2-烷基/芳基硫代苯并[ b ]噻吩1,1-的高效合成二氧化碳。失活的磺酰基通过原位攻击决定亲电加成的位点选择性,而随后的 S-迁移控制区域选择性。一些 2-甲硫基苯并[ b ]噻吩 1,1-二氧化物在固态及其溶液中表现出荧光特性。