Transition Metal-Free C–H Thiolation via Sulfonium Salts Using β-Sulfinylesters as the Sulfur Source
作者:Yanhui Chen、Si Wen、Qingyu Tian、Yuqing Zhang、Guolin Cheng
DOI:10.1021/acs.orglett.1c02912
日期:2021.10.15
We disclose a direct C(sp)–, C(sp2)–, and C(sp3)–H thiolation reaction using β-sulfinylesters as the versatile sulfur source. The key step of this protocol is chemoselective C–S bond cleavage of the sulfonium salts that are formed in situ from the corresponding alkenes, alkynes, and 1,3-dicarboxyl compounds with β-sulfinylesters. The successful capture of the acrylate byproduct supports a retro-Michael
我们公开了使用 β-亚磺酰基酯作为通用硫源的直接 C(sp)-、C(sp 2 )- 和 C(sp 3 )-H 硫醇化反应。该协议的关键步骤是从相应的烯烃、炔烃和 1,3-二羧基化合物与 β-亚磺酰基酯原位形成的锍盐的化学选择性 C-S 键裂解。丙烯酸酯副产物的成功捕获支持了逆迈克尔反应机制。