The Rhodium-Catalyzed Carbene Cyclization Cycloaddition Cascade Reaction of Vinylsulfonates
作者:Bairu Shi、Sandra Merten、David K.â Y. Wong、John C.â K. Chu、Lok Lok Liu、Sze Kui Lam、Anne Jäger、Wing-Tak Wong、Pauline Chiu、Peter Metz
DOI:10.1002/adsc.200900695
日期:2009.12
Vinylsulfonates have proved to be excellent dipolarophiles for carbonyl ylides derived from diazoketones in rhodium-catalyzed intramolecular cycloadditions. Polyfunctional substrates, such as 8 and (+)-15, were readily available from hydroxy esters, e.g. 1 and the cyclopenta-1,3-dione 10, respectively, and the resulting polycyclic sultones were formed under mild reaction conditions in high yields with