Regioselective Formation of Silylated Cyclobutenes by the Photochemical [2+2] Cycloaddition of 2(5H)-Furanones to Trialkylsilylacetylenes
作者:Andrea D'Annibale、Maurizio D'Auria、Giovanna Mancini、Alessio Daniel Pace、Rocco Racioppi
DOI:10.1002/ejoc.201101332
日期:2012.2
Enantiopure 5-alkyl-4-methyl-2(5H)-furanones reacted by [2+2] photochemical cycloaddition with several trialkylsilylacetylenes to afford regioselectively 3-oxabicyclo[3.2.0]hept-6-en-2-ones silylated at the vinylic C-7 atom. The possible reasons for such regioselectivity are discussed. The anti/syn stereoselectivity of the photocycloaddition depends on the nature of the alkyl group on the silicon atom