Enantioselective Halogenation of β-Oxo Esters Catalyzed by a Chiral Sulfoximine-Copper Complex
作者:Marcus Frings、Carsten Bolm
DOI:10.1002/ejoc.200900467
日期:2009.8
A C1-symmetric amino sulfoximine has been used as a chiral ligand in copper-catalyzed asymmetric halogenation reactions of β-oxo esters. Both the catalyst itself and the reaction conditions were optimized, and 26 fluorinated, chlorinated, and brominated products were obtained with enantioselectivities of up to 91 % ee in yields of up to 99 %. (© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany
在铜催化的 β-氧代酯的不对称卤化反应中,C1 对称氨基亚砜亚胺已用作手性配体。对催化剂本身和反应条件进行了优化,获得了 26 种氟化、氯化和溴化产物,对映选择性高达 91% ee,产率高达 99%。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009)