Synthesis and spectral characterization of unsymmetrical Schiff bases derived from 2,3-diaminopyridine. Crystal and molecular structure of 3-acetyl-4-[N-(2′-aminopyridinyl)-3-amino]-3-buten-2-one
作者:Ewa M Opozda、Wiesław Łasocha、Barbara Włodarczyk-Gajda
DOI:10.1016/s0022-2860(03)00414-9
日期:2003.9
Abstract Reactions of 2,3-diaminopyridine with 3-(4′-nitrophenyl)-3-oxo-propionaldehyde and 3-ethoxyvinylidene-2,4-pentanedione in ethanol result in either products of condensation 1:1 (1, 3) or 1:2 (2). All Schiffbases were studied by spectroscopic methods. In the crystalline state and in a chloroform solution all the products exist in an enaminone form. The structure of 3-acetyl-4-[N-(2′-aminop