Homo- and Cross-Olefin Metathesis Coupling of Vinylphosphane Oxides and Electron-Poor Alkenes: Access to P-Stereogenic Dienophiles
作者:Nikolai Vinokurov、Anna Michrowska、Anna Szmigielska、Zbigniew Drzazga、Grzegorz Wójciuk、Oleg M. Demchuk、Karol Grela、K. Michał Pietrusiewicz、Holger Butenschön
DOI:10.1002/adsc.200505463
日期:2006.5
Vinylphosphaneoxides 6 undergo catalytic olefin homo-metathesis leading to achiral and P-stereogenic diphosphane dioxides 7 with exclusive (E)-selectivity. Similarly, EWG-substituted vinylphosphaneoxides 11, 12 could be prepared with complete (E)-olefin selectivity via olefin cross-metathesis with electron-deficient substrates, such as methyl acrylate and 2-fluorostyrene, using nitro-Hoveyda ruthenium