Synthesis of Heterocyclic Systems by the Reaction of Zwitterionic Compounds with Isocyanates and Thiophosgene
作者:Barbara Zaleska、Marcin Karelus
DOI:10.1055/s-2002-34866
日期:——
The reaction of various isocyanates or thiophosgene with zwitterionic pyrimidinylium and 1,3-diazepinylium derivatives has led to the formation of unusually substituted [1,3]oxazolo[3,4-α]pyrimidines and novel heterocyclic system such as [1,3]oxazo-lo[3,4-a][1,3]diazepine.
A synthesis of quinazolines, perimidines and dibenzo[d,f][1,3]diazepines is described. The method involves rearrangements following cyclisation of 2-anilino-2-methoxy-3-oxo-N-phenylbutanethioamides with aromatic 1,3-and 1,4-diamines.