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.
Structural revision in the reactions of 3-cyanochromones with primary aromatic amines. Improved synthesis of 2-amino-3-(aryliminomethyl)chromones
作者:Vyacheslav Ya. Sosnovskikh、Vladimir S. Moshkin、Mikhail I. Kodess
DOI:10.1016/j.tetlet.2009.09.028
日期:2009.11
2-amino-3-(aryliminomethyl)chromones as the sole products or as their mixtures with Z- and E-3-anilino-2-salicyloylacrylonitriles, depending on the reaction conditions. With aliphatic amines, 2-amino-3-(alkyliminomethyl)chromones are obtained in good yields. The reaction of 3-cyanochromone with o-phenylenediamine is reinvestigated and proof for the product structure and a possible reaction pathway are presented