Condensation reactions of o-phenylenediamine and two equivalents of acetophenone under gallium(III) triflate catalysis produce biaryl-substituted 1,5-benzodiazepines. Similar reactions of o-phenylenediamine or o-aminothiophenol and o-hydroxy chalcones lead to formation of functionalized 1,5-benzodiazepines and 1,5-benzothiazepines in good to excellent yields. The ortho-hydoxy group of chalcones is crucial for this unprecedented condensation process. (C) 2008 Elsevier Ltd. All rights reserved.
An efficient synthesis of 1,5-benzothiazepines in the presence of sub-stoichiometric amount of cyanuric chloride
作者:Pengli Sun、Lizheng Fang、Liqiang Wu
DOI:10.1080/17415993.2011.572971
日期:2011.6.1
An efficient synthesis of 1,3-diaryl-2,3-dihydro-1,5-benzothiazepines has been developed by the reaction of various 1,3-diaryl-2-propenones with 2-aminothiophenol under thermal solvent-free conditions in the presence of a sub-stoichiometric amount of cyanuric chloride. [image omitted].