Direct asymmetric aldol reactions in water with a β-aminosulfonamide organocatalyst
摘要:
Organocatalyst 4 promoted the direct asymmetric aldol reactions of aldehydes with ketones in brine or in the presence of water to afford the corresponding anti-aldol products in moderate to excellent yields with up to 97% ee. (C) 2011 Elsevier Ltd. All rights reserved.
Direct asymmetric aldol reactions in brine using novel sulfonamide catalyst
摘要:
Direct asymmetric aldol reactions of aldehydes with ketones in the presence of a catalytic amount of sulfonamide 4 and trifluoroacetic acid afforded the corresponding anti-aldol products in moderate to excellent yields with 85-93% ee. (C) 2009 Elsevier Ltd. All rights reserved.