Vinyl Sulfonium Salts as the Radical Acceptor for Metal-Free Decarboxylative Alkenylation
作者:Yu-Lan Zhang、Lei Yang、Jie Wu、Chunyin Zhu、Peng Wang
DOI:10.1021/acs.orglett.0c03074
日期:2020.10.2
Vinyl sulfonium salts typically act as an electrophilic Michael acceptor, thus initiating many tandem cyclization reactions. Herein, we disclosed the novel reactivity of vinyl sulfonium salts as a radical acceptor. Using redox-active ester as an alkyl radical precursor, metal-free decarboxylative alkenylation with vinyl sulfonium salts was realized using eosin Y as a photocatalyst. This process features
乙烯基sulf盐通常充当亲电的迈克尔受体,因此引发许多串联环化反应。在这里,我们公开了乙烯基sulf盐作为自由基受体的新型反应性。使用氧化还原活性酯作为烷基自由基前体,使用曙红Y作为光催化剂实现了带有乙烯基sulf盐的无金属脱羧烯基化。该方法具有广泛的底物范围,并能耐受多种伯,仲,叔羧酸。