Heterocyclic Compounds
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ChemInform Abstract: An Efficient Approach to the [1,2,4]-Triazolo[3,2-d][1,5]benzoxazepine Skeleton — A Novel Tricyclic Ring System.
First published: 08 June 2010
Abstract
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ChemInform Abstract
Reaction of allene-like cations derived from 4-chromanone arylhydrazones (I) with nitriles provides an efficient entry to the so far unknown triazolobenzoxazepine ring system present in compounds (IV) and (VI). The reaction proceeds via a tandem cycloaddition—ring enlargement mechanism.
