A. Alberola, Rocío Álvaro, A. G. Ortega
Nov 24, 1997
Citations
0
Influential Citations
4
Citations
Journal
Tetrahedron
Abstract
Abstract 2-N-(Acylmethyl)aminochromones were prepared from 2-chlorochromone and α-amino ketones (hydrochloride or ketal derivatives) in ethanol/triethylamine. Their treatment with acetic acid/pyrrolidine led to [1]benzopyrano[2,3-b]pyrrol-4(1H)-ones, which were subsequently functionalized in C2 by aromatic electrophilic substitution (acetylation, bromination or nitration).