General Method for the Preparation of Substituted 2-Amino-4H,5H-pyrano[4,3-b]pyran-5-ones and 2-Amino-4H-pyrano[3,2-c]pyridine-5-ones
作者:Edmont Stoyanov、Ivo Ivanov、Dieter Heber
DOI:10.3390/50100019
日期:——
Published: 21 January 2000Abstract: Reaction of 4-hydroxy-6-methyl-2-pyrone (1a) as well as 4-hydroxy-6-methyl-2(1H)-pyridones (1b-d) with arylmethylene malononitriles or arylmethylene methyl cyano-acetates (2a-h) leads to the formation of the very stable 5,6-fused bicyclic 2-amino-4H-pyran derivatives 3a-3af.Keywords: pyrano[4,3-b]pyran, pyrano[3,2-c]pyridine, arylmethylene malononitrile, aryl-methylene