(l)-H-Pro-(l)-Phe-OH (4) were found to be efficient catalysts for direct asymmetric aldol reactions between acetone and various aldehydes. The reaction conditions use a DMSO-NMM-PEMG 5000 system at 0 °C in high yields (62-96%) and enantioselectivities (up to >99% ee).
发现 (l)-H-Pro-(l)-Phe-OH (4) 是
丙酮和各种醛之间直接不对称醛醇反应的高效催化剂。反应条件采用
DMSO-NMM-P
EMG 5000 系统,温度为 0 °C,产率高(62-96%),对映体选择性高(ee>99%)。