Synthesis of Dibenzo[<i>d</i>,<i>f</i>][1,3]Diazepines via Elemental Sulfur-Mediated Cyclocondensation of 2,2′-Biphenyldiamines with 2-Chloroacetic Acid Derivatives
作者:Tatyana A. Tikhonova、Konstantin A. Lyssenko、Igor V. Zavarzin、Yulia A. Volkova
DOI:10.1021/acs.joc.9b02002
日期:2019.12.20
three-component reaction of 2,2'-biphenyldiamines with 2-chloroacetic acid derivatives and elemental sulfur was developed for the practical synthesis of unknown 2-carboxamide-substituted dibenzo[d,f][1,3]diazepines. This protocol is distinguished by efficiency in water and good tolerance to functional groups and can be adapted to a large-scale synthesis. The chemoselective preparation of a variety of