Cascade Radical Annulation of 2-Alkynylthio(seleno)anisoles with Acetone or Acetonitrile: Synthesis of 3-Acetomethyl- or Cyanomethyl-Substituted Benzothio(seleno)phenes
作者:Tao Cai、Fangqi Shen、Yuqi Ni、Huiting Xu、Runpu Shen、Yuzhen Gao
DOI:10.1021/acs.joc.0c02444
日期:2021.1.1
for the direct preparation of 3-aceto(cyano)methyl-substituted benzothio(seleno)phenes has been achieved through C(sp3)–H bond activation of easily available acetone or acetonitrile and cascade radical cyclization reaction. In this cascade radical cyclization reaction, C(sp2)–C(sp3) and C(sp2)–S bonds, as well as benzenethio(seleno)phene skeletons, can be built along with the cleavage of the C(sp3)–S
通过容易获得的丙酮或乙腈的C(sp 3)-H键活化和级联自由基环化反应,已经实现了直接制备3-乙酰基(氰基)甲基取代的苯并硫基(硒代)苯的有效方法。在此级联自由基环化反应中,可以随C(sp)的裂解构建C(sp 2)–C(sp 3)和C(sp 2)–S键以及苯硫基(硒代)苯骨架。3)– S键,证明这种方法具有较高的步骤经济性和效率。