Tetrahedron p. 15895 - 15902 (1997)
Update date:2022-08-03
Topics:
Molina, Pedro
Tarraga, Alberto
Curiel, David
De Arellano, Carmen Ramirez
The first synthesis of the imidazo[1,5-c][1,3]benzodiazepine ring system has been carried cut by reaction of the iminophosphorane derived from the (Z)-5-(o-azidoarlylidene)hydantoin with isocyanates. The isomeric (E)-tributyliminophosphorane undergoes intramolecular aza Wittig reaction to give the imidazo[4,5-b]quinolin-2-one ring.
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