Chiral phosphine-prolineamide as an organocatalyst in direct asymmetric aldol reactions
摘要:
Chiral phosphine-prolineamide 1a was employed as an organocatalyst in direct asymmetric aldol reactions of various aromatic aldehydes with ketones. Cyclohexanone led to the aldol products in up to 98% ee and with good diastereoselectivity using 10 mol % of TFA and 30 mol % of prolineamide 1a in DMF at 0 degrees C. (C) 2011 Elsevier Ltd. All rights reserved.
Chiral phosphine-prolineamide as an organocatalyst in direct asymmetric aldol reactions
摘要:
Chiral phosphine-prolineamide 1a was employed as an organocatalyst in direct asymmetric aldol reactions of various aromatic aldehydes with ketones. Cyclohexanone led to the aldol products in up to 98% ee and with good diastereoselectivity using 10 mol % of TFA and 30 mol % of prolineamide 1a in DMF at 0 degrees C. (C) 2011 Elsevier Ltd. All rights reserved.