A simple and mild photoredox catalytic approach to access difluoroalkylated dioxodibenzothiazepines in high regioselectivity via radical cascadecyclization has been described herein. In contrast to previous methods, this strategy does not involve the use of transition-metal catalysts and avoids the potential disadvantages of inevitable toxicity and the tedious removal process of metal catalysts. The
A direct approach to 2-(aminomethyl)indoles by copper-catalyzed domino three-component coupling−cyclization of 2-ethynylanilines with a secondary amine and aldehyde has been developed. By use of a cyclic or acyclic secondary amine and aldehyde (paraformaldehyde, aliphatic or aromatic aldehydes) in the presence of 1 mol % of CuBr, 2-ethynylanilines were converted to a variety of substituted 2-(aminomethyl)indoles
通过铜催化的2-乙炔基苯胺与仲胺和醛的多米诺三组分偶联-环化反应,已开发出直接方法用于2-(氨基甲基)吲哚。通过在1摩尔%的CuBr存在下使用环状或无环仲胺和醛(低聚甲醛,脂肪族或芳香族醛),将2-乙炔基苯胺以良好的收率转化为各种取代的2-(氨基甲基)吲哚。利用该多米诺反应和吲哚C-3位的CH官能化,可以轻松合成多环吲哚。还介绍了通过磺酰胺和丙二酸酯同类物的反应来构建苯并[ e ] [1,2]噻嗪和茚基图案。
Photoinduced Three‐Component Difluoroamidosulfonylation/Bicyclization: Regioselectivity Synthesis of Seven‐Membered Dibenzosultams
mild and safe photochemical methodology has been developed to access difluoroamidosulfonylated dioxodibenzothiazepines via three-component radical bicyclization cascades. This photocatalyst-free transformation avoids cumbersome photocatalyst removal procedure and potential toxicity. Mechanistic experiments reveal the generation of an electron donor-acceptor (EDA) complex in the reaction process. Moreover
A mild and efficient Cu-assisted trifluoromethylthiolation/radical cascade cyclization of alkynes with readily available and stable AgSCF3 as the trifluoromethylthiolating reagent has been disclosed.