Enantioselective epoxidation of olefins catalyzed by new sterically hindered salen–Mn(III) complexes
作者:Kwang-Hyun Ahn、Sang Wook Park、Soojin Choi、Hyun-Ju Kim、Chi Jang Moon
DOI:10.1016/s0040-4039(01)00195-2
日期:2001.3
New, sterically hindered chiral salen–Mn(III) complexes, 5 and 6, were prepared from an aldehyde derived from BINOL. These substances catalyze efficient, enantioselective NaOCl-promoted epoxidations of olefins and enantioselectivities as high as 96–99% ee are observed in epoxidations of cis-β-methylstyrene and 2,2-dimethylchromene.
由BINOL衍生的醛制备了新的位阻手性Salen-Mn(III)配合物5和6。这些物质催化烯烃的高效,对映选择性NaOCl促进的环氧化,在顺式-β-甲基苯乙烯和2,2-二甲基亚甲基的环氧化中观察到高达96-99%ee的对映选择性。