Ring-chain tautomerism of 2-aryl-substituted-hexahydropyrimidines and tetrahydroquinazolines
作者:Anikó Göblyös、László Lázár、Ferenc Fülöp
DOI:10.1016/s0040-4020(01)01196-6
日期:2002.1
1-phenylhexahydropyrimidines and 3-isopropyl- and 3-phenyl-1,2,3,4-tetrahydroquinazolines proved to be ring-chaintautomeric mixtures in CDCl3 at 300 K, whereas only ring-closed tautomers could be detected for the 1- or 3-methyl-substituted analogues. The ratios of the ring-chaintautomeric forms at equilibrium could be described by the equation