Selective Synthesis of Chiral Dioxabicyclo[4.4.0]decane and Dioxabicyclo[5.3.0]decane from 3,4-Bisallyloxy-but-1-yne Derivatives via Ruthenium-Catalyzed En-yn-ene Metathesis
作者:Chang-Jung Wu、Reniguntala J. Madhushaw、Rai-Shung Liu
DOI:10.1021/jo0301548
日期:2003.10.1
Grubbs catalyst Cl2(PCy3)2Ru=CHPh (3 mol %) preferably gave chiral dioxabicyclo[4.4.0]decane (yields > 55%) in addition to dioxabicyclo[5.3.0]decane in minor proportions. On substitution of the 4-allyloxy group of these substrates with a 4-but-2-enyloxy group, the metathesis reactions produced only dioxabicyclo[5.3.0]decane in the presence of Grubbs ruthenium-imidazolidene carbene catalyst.