Synthesis of Dibenzo[d,f][1,3]Diazepines via Elemental Sulfur-Mediated Cyclocondensation of 2,2′-Biphenyldiamines with 2-Chloroacetic Acid Derivatives
2019
Tikhonova, Tatyana A. | Lyssenko, Konstantin A. | Zavarzin, Igor V. | Volkova, Yulia A.
The 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 2-S,N,O-substituted dibenzo[d,f][1,3]diazepines was accomplished using the developed method.
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