Rhodium(II)-catalyzed olefin cyclopropanation with the phenyliodonium ylide derived from Meldrum's acid
作者:Paul Müller、Yves Allenbach、Estelle Robert
DOI:10.1016/s0957-4166(03)00029-6
日期:2003.4
The phenyliodonium ylide 3a derived from Meldrum's acid reacts with olefins in the presence of Rh(II) carboxylate catalysts to afford cyclopropanes. The reaction is stereospecific. Enantioselectivities of up to 63% have been observed for the cyclopropanation of pent-1-ene. No 1,3-cycloadducts are formed between 3a and polarized olefins such as furan or 2,3-dihydrofuran.
衍生自梅德鲁姆酸的苯基碘化铵叶立德3a在羧酸Rh(II)催化剂存在下与烯烃反应,生成环丙烷。该反应是立体特异性的。对于戊-1-烯的环丙烷化,观察到高达63%的对映选择性。在3a和极化的烯烃(例如呋喃或2,3-二氢呋喃)之间没有形成1,3-环加合物。