Synthesis of bischromones by deformylative Mannich type reaction on chromone-3-carbaldehyde using alpha-aminoacid as the source of amine

Panja, S.K., Maiti, S., Drew, M.G.B. and Bandyopadhyay, C. (2009) Synthesis of bischromones by deformylative Mannich type reaction on chromone-3-carbaldehyde using alpha-aminoacid as the source of amine. Tetrahedron, 65 (7). pp. 1276-1280. ISSN 0040-4020 doi: 10.1016/j.tet.2008.12.065

Abstract/Summary

Chromone-3-carbaldehyde reacts with N-methylglycine or glycine in the presence of excess formaldehyde to produce N-(chromone-3-ylmethyl)-N-methylglycine or N,N-di(chromone-3-ylmethyl)glycine, respectively, by a deformylative Mannich type reaction. Use of alanine or leucine or methionine in place of glycine produces N-(chromone-3-ylmethyl)alanine/-leucine/-methionine, respectively. (C) 2009 Elsevier Ltd. All rights reserved.