Novel route for the transformation of a pyrimidine ring using hydrazides

…, DA Tadevosyan, RA Tamazyan, GA Panosyan

文献索引：Danagulyan; Tadevosyan; Tamazyan; Panosyan Chemistry of Heterocyclic Compounds, 2006 , vol. 42, # 2 p. 233 - 245

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被引用次数: 2

摘要

Abstract It has been shown from X-ray structural analytical data that the reaction of 2- ethoxycarbonylmethyl-1, 4, 6-trimethylpyrimidinium iodide with carboxylic acid hydrazides gives pyrazolo [1, 5-a] pyrimidine derivatives and not the isomeric triazolo [4, 3-a] pyridines previously reported. This novel and previously unreported rearrangement of 1, 2- dialkylpyrimidinium salts occurs via recyclization of the pyrimidine ring with inclusion of a ...