Direct Enantioselective Three-Component Kabachnik-Fields Reaction Catalyzed by Chiral Bis(imidazoline)-Zinc(II) Catalysts
作者:Mutsuyo Ohara、Shuichi Nakamura、Norio Shibata
DOI:10.1002/adsc.201100482
日期:2011.12
A direct three-component reaction of aldehydes, amines and diaryl phosphites was catalyzed by a zinc(II) complex of 1,3-bis(imidazolin-2-ly)pyridine (pybim) giving the corresponding α-aminophosphonates in good yield with good enantioselectivity. The reaction was applied to a wide variety of aromatic aldehydes to give products with excellent yields (up to 99%) and enantiomeric excesses (up to 93% ee)
1,3-双(咪唑啉-2-ly)吡啶(pybim)的锌(II)络合物催化醛,胺和亚磷酸二芳酯的直接三组分反应,从而以高收率和良好收率得到相应的α-氨基膦酸酯对映选择性。反应可用于多种芳族醛,可制得具有极佳收率(最高达99%)和对映体过量(最高达ee 93%)的产物。