Preparation of Alkyl Di(<i>p</i>-tolyl)sulfonium Salts and Their Application in Metal-Free C(sp<sup>3</sup>)–C(sp<sup>3</sup>) and C(sp<sup>3</sup>)–C(sp<sup>2</sup>) Bond Formations
作者:Kazuhiro Higuchi、Kai Yamamoto、Shunsuke Nakamura、Haruka Naruse、Motoki Ito、Shigeo Sugiyama
DOI:10.1021/acs.orglett.3c01233
日期:2023.5.26
Alkyldiarylsulfonium salts were synthesized by a combination of active sulfonium species, prepared through the activation of diarylsulfoxide, and alkyl nucleophiles. The isolated sulfonium salts were subjected to the allylation and cyclopropanation of the active methylene compounds and metal-free C(sp3)–C(sp2) couplings via oxyallyl cation intermediates under mild conditions. The series of reactions
烷基二芳基硫盐是通过活性硫物种的组合合成的,通过二芳基亚砜的活化和烷基亲核试剂制备。分离出的硫鎓盐在温和条件下通过氧烯丙基阳离子中间体进行活性亚甲基化合物的烯丙基化和环丙烷化以及无金属 C(sp 3 )–C(sp 2 ) 偶联。这一系列反应包括偶联烷基亲核试剂和使用硫鎓盐形成无金属 C-C 键的 umpolung 策略。