An efficient, high-yield, one-pot preparation of pyrrolo[1,3-b]pyridines by a consecutive aza Wittig reaction-electrocyclic ring closure-intramolecular amination process

Article abstract of DOI:10.1055/s-1993-26034

Aza Wittig reaction of iminophosphoranes derived from ethyl (E,E,E)-1-azido-7-phenyl-2,4,6-heptatrienoate with aromatic isocyanates in nitrobenzene at reflux temperature leads directly to pyrrolo[2,3-b]pyridines in good yields.