Direct Asymmetric syn-Aldol Reactions of Linear Aliphatic Ketones with Primary Amino Acid-Derived Diamines
作者:Anneleen L. W. Demuynck、Jozef Vanderleyden、Bert F. Sels
DOI:10.1002/adsc.201000419
日期:2010.10.4
novel class of chiral diamine organocatalysts based on natural primary amino acids that efficiently catalyze syn-selective aldol reactions of challenging linear ketones, such as 2-butanone, and aromatic aldehydes. In the presence of trifluoroacetic acid (TFA) as Brønsted acid and 2,4-dinitrophenol (DNP) as co-catalyst, syn-aldol products have been obtained with excellent enantioselectivities of up to> 99%
我们基于天然伯氨基酸设计了新颖的一类手性二胺有机催化剂,其有效催化具有挑战性的线性酮如2-丁酮和芳族醛的顺式-选择性羟醛反应。在三氟乙酸(TFA)作为布朗斯台德酸和2,4-二硝基苯酚(DNP)作为助催化剂的存在下,已获得具有高达> 99%ee的优异对映选择性的顺式醛醇产物。