Strontium-Catalyzed Highly Enantioselective Michael Additions of Malonates to Enones
作者:Magno Agostinho、Shū Kobayashi
DOI:10.1021/ja710332h
日期:2008.2.1
A novel catalyst system based on a chiral strontium complex which promotes the catalytic asymmetric Michael addition reactions of malonates to enones has been developed. The conjugate addition reactions proceeded smoothly in the presence of 5 mol % of the chiral strontium catalyst, at room temperature, to afford the desired adducts in high yields and excellent enantioselectivities. This method provides
Strontium hexamethyldisilazide, combined with a chiral bis(sulfonamide) ligand, was found to be very effective for the catalytic asymmetricMichaeladdition of malonate to chalcone derivatives.