A new class of chiral phosphinothioureas has been developed as efficient organocatalyst for the enantioselective Morita–Baylis–Hillman reaction of aromatic aldehydes with methyl vinyl ketone. The reaction proceeds under very mild conditions to afford the desired product in a short time period in good to excellent yields with up to 94% ee.
Chiral phosphinothiourea-catalyzed asymmetric Morita–Baylis–Hillman reactions of acrylates with aromatic aldehydes
作者:Kui Yuan、Hong-Liang Song、Yinjun Hu、Xin-Yan Wu
DOI:10.1016/j.tet.2009.07.066
日期:2009.9
chiral bifunctional phosphinothioureas were synthesized and applied to the enantioselective Morita–Baylis–Hillmanreaction of aromaticaldehydes with acrylates. In the presence of 8 mol % of organocatalyst 2e, the Baylis–Hillman adducts were obtained in good enantioselectivities and up to 96% yield under mild reaction conditions.