Structure of reaction products of 3-cyanochromones with ethylenediamine
作者:V. Ya. Sosnovskikh、V. S. Moshkin、O. S. El’tsov
DOI:10.1007/s11172-010-0372-0
日期:2010.11
A reaction of 3-cyanochromones with ethylenediamine in ethanol afforded N,N′-ethyl-ene-bis(2-amino-3-iminomethylchromones), which depending on the time of reflux in acetic acid give 2-amino-3-formylchromones or products of their dimerization, 2-(chromon-3-yl)-5H-chromeno[2,3-d]pyrimidin-5-ones.
Reactions of 3-cyanochromones with primary amines: structures of the products
作者:V. Ya. Sosnovskikh、V. S. Moshkin、M. I. Kodess
DOI:10.1007/s11172-010-0127-y
日期:2010.3
Reactions of 3-cyanochromones with primary aromatic amines in boiling benzene gave mixtures of Z- and E-3-arylamino-2-(2-hydroxyaroyl)acrylonitriles and 2-amino-3-(aryl-iminomethyl)chromones. The latter can easily be obtained in the individual state when the reaction is carried out in the presence of triethylamine. In the case of primary aliphatic amines, the open-chain reaction product immediately