1-Benzopyran-4(4H)-ones as novel activated alkenes in the Baylis–Hillman reaction: a simple and facile synthesis of indolizine-fused-chromones
摘要:
1-Benzopyran-4(4H)-one derivatives have been successfully employed as novel activated alkenes in the Baylis-Hillman coupling with heteroaromatic-aldehydes, nitrobenzaldehydes and isatin-derivatives and the corresponding adducts, derived from pyridine-2-carboxaldehyde, have been transformed into a novel indolizine-fused-chromone framework. (C) 2003 Elsevier Science Ltd. All rights reserved.
Chromonyl-(3)-methanol- und Bischromonyl-(3)-methan-Derivate. 46. Mitt. über Untersuchungen an 4-Pyronen
作者:F. Eiden、W. Luft
DOI:10.1002/ardp.19743070105
日期:——
Aus o‐Hydroxy‐ω formylacetophenon (2) und Aldehyden entstehen Chromonyl‐(3)‐methanol‐oder Bischromonyl‐(3)‐methan‐Derivate (1, 3). Durch Hydrolyse von 3 können Bissalicyloyl‐propan‐Derivate (5) erhalten werden, die sich durch Reaktion mit Dimethylformamid‐dimethyl‐acetal wieder zu 3 umsetzen lassen.