Ruthenium-Catalyzed [2 + 2] Cycloadditions between Norbornene and Propargylic Alcohols or Their Derivatives
作者:Gavin C. Tsui、Karine Villeneuve、Emily Carlson、William Tam
DOI:10.1021/om500563h
日期:2014.7.28
Diastereoselective ruthenium-catalyzed [2 + 2] cycloadditions of norbornene and propargylic alcohols or their derivatives were investigated. The cycloadditions were found to be highly stereoselective, giving exo cycloadducts in moderate to excellent yields with diastereoselectivities up to 92:8. When a chiral propargylic alcohol was used in the cycloaddition, up to 80% ee of the [2 + 2] cycloadducts was
Diastereoselective Ruthenium-Catalyzed [2+2] Cycloadditions between Bicyclic Alkenes and a Chiral Propargylic Alcohol and its Derivatives
作者:William Tam、Karine Villeneuve、Robert W. Jordan
DOI:10.1055/s-2003-42108
日期:——
ruthenium-catalyzed [2+2] cycloadditions of symmetrical bicyclic alkenes and a chiral propargylic alcohol or its derivatives were investigated. The cycloadditions were found to be highly chemo- and stereoselective giving anti-exocycloadducts in moderate to good yields. Diastereoselectivities of 58:42 to 84:16 were observed with chiral propargylic alcohol 2f and its derivatives 2a-g.