Tetrahedron Letters, vol.49, no.6, pp.1062-1065, 2008 (Journal Indexed in SCI Expanded)
Article / Article
Title of Journal :
carbene, 1,5-electrocyclization, 1,7-electrocyclization, dihydrofuran, dihydrobenzoxepine, DIMETHYL DIAZOMALONATE, DIAZO-COMPOUNDS, RING-CLOSURE, CYCLOPROPANATION, CYCLIZATION, ALPHA,BETA-ENONES, ENAMINONES, EFFICIENT, ROUTE, CORE
α-Benzylidene-β,β′-biscarbonyl compounds were reacted with dimethyl diazomalonate using Cu(II) acetylacetonate as a catalyst. Dihydrofurans or mixtures of dihydrofurans and dihydrobenzoxepines were obtained depending on the nature of the carbonyl group present in the starting material. © 2007 Elsevier Ltd. All rights reserved.