Regioselective N-alkylation of 2-aminobenzothiazoles with benzylic alcohols
作者:Feng Li、Haixia Shan、Qikai Kang、Lin Chen
DOI:10.1039/c1cc10604j
日期:——
The preparation of 2-(N-alkylamino)benzothiazoles via regioselecive N-alkylation of 2-aminobenzothiazoles has been accomplished by using benzylic alcohols as alkylating agents.
An Fe(III) catalyzed, efficient methodology for the synthesis of 2-aminobenzothiazole derivatives in water was established. This mild, base-free, one-pot strategy showcases the reaction of readily available 2-bromophenyl isothiocyanate with a broad range of substituted amines such as aliphatic, aromatic, primary, secondary and cyclic amines under air. Notably, the reaction afforded the corresponding
The first manganese catalyzed tandem methodology for the synthesis of 2-aminobenzothiazoles from 2-bromophenyl isothiocyanate and differently substituted amines has been demonstrated. This protocol employs environmentally benign, cost-effective and readily available MnCl2.4H2O as the catalyst under air. The present strategy exhibits wide substrate scope and affords differently substituted 2-aminobenzothiazoles