A new chiral primary–tertiary diamine-Brønsted acid salt organocatalyst for the highly enantioselective direct anti-aldol and syn-Mannich reactions
作者:Guodong Chen、Xiangkai Fu、Chuanlong Wu、Chao Li
DOI:10.1007/s11164-012-0667-x
日期:2013.3
A new primary–tertiary diamine catalyst is easily prepared in a few steps from inexpensive, commercially available, enantiopure materials. This organocatalyst can be effective catalyzed the direct asymmetric aldol and Mannich reactions. The anti-aldol products can be obtained with up to a 99:1 anti/syn ratio and >98 % ee, while the syn-Mannich products could be obtained with up to a 99:1 syn/anti ratio