can be prepared by the catalytic enantioselective cross-aldol reaction of acetone with trihalomethyl ketones by usingN-(8-quinolinesulfonyl)prolinamide as an organocatalyst. The MO calculations elucidate that the hydrogen bonding between the sulfonimide proton and the 8-quinolyl nitrogen atom plays an important role in exerting the enantioselectivity of the reaction.
Tripeptide-Catalyzed Asymmetric Aldol Reaction of Trifluoromethylated Aromatic Ketones with Acetone
作者:Yoshihito Kohari、Kazumasa Kon、Miki Murata
DOI:10.3987/com-18-s(f)77
日期:——
asymmetric aldolreaction of trifluoromethylated aromatic ketone 1 with acetone was achieved. The 3d-catalyzed aldolreaction of 1a–1j provided various aldol adducts 4a–4j with up to 81% yield and 77% ee. An investigation of the transition state via DFT calculations revealed that hydrogen bonding was important for the revelation of the enantioselectivity. The direct asymmetric aldolreaction is one of the