Preparation of [5,6,6] tricyclic guanidines from C,C-bis(iminophosphoranes)
摘要:
Aza Wittig-type reaction of C,C-bis(iminophosphorane) 4, derived from 2,5-bis(o-aminophenyl)pyrrole, with two equivalents of aryl isocyanates directly provided the tricyclic guanidines 9, which underwent elimination of the corresponding diarylcarbodiimide by thermal treatment to give the parent [5,6,6] tricyclic guanidine 13.
Bispyridoannulation reaction onto a preformed five-membered heterocycle is achieved by the tandem aza Wittig/electrocyclic ring closure methodology. The method allows the one-step formation of diquinopynoles, dipyridopyrroles, furodipyridines and thienodipyridines. The crystal and molecular structure of the 6,7-dibenzylamino-13-methoxymethyl-13H-diquino[4,3-b:3′,4′-dpyrrole. acetonitrilecomplex has
Preparation of [5,6,6] tricyclic guanidines from C,C-bis(iminophosphoranes)
作者:Pedro Molina、Mateo Alajarín、Angel Vidal
DOI:10.1016/0040-4020(95)00196-f
日期:1995.5
Aza Wittig-type reaction of C,C-bis(iminophosphorane) 4, derived from 2,5-bis(o-aminophenyl)pyrrole, with two equivalents of aryl isocyanates directly provided the tricyclic guanidines 9, which underwent elimination of the corresponding diarylcarbodiimide by thermal treatment to give the parent [5,6,6] tricyclic guanidine 13.