Base-catalyzed intramolecular heterocyclization of o-alkynylbenzhydrazides
作者:T. F. Mikhailovskaya、S. F. Vasilevsky
DOI:10.1007/s11172-010-0133-0
日期:2010.3
The reaction of methyl o-(2-R-ethynyl)benzoates with hydrazine affords either fused 4-R-methylphthalazin-1-ones or 2-amino-3-R-methylideneisoindolin-1-ones. The latter are on treatment with KOH undergo recyclization into the corresponding 4-R-methylphthalazin-1-ones.