Benzimidazolo-diazepines from 1,3-dienes and arenediazocyanides through a 1,3,4-tri-aza-Cope rerrangement.
作者:Daniel Rousselle、Thomas Ryckmans、Heinz G. Viehe
DOI:10.1016/s0040-4020(01)89022-0
日期:——
and bicyclic 1-cyano-2-arylhydrazines were prepared from arene diazocyanides and 1,3-dienes. Some of them rearrange at room temperature through a 1,3,4-tri-aza-Cope rearrangement, followed by an intramolecular cyclisation, to afford benzimidazolo-diazepines in moderate yields. When the competitive retro Diels-Alder reaction is made impossible by reduction of the cycloadducts, the rearrangement takes