RECYCLABLE CHIRAL CATALYST FOR ASYMMETRIC NITROALDOL REACTION AND PROCESS FOR THE PREPARATION THEREOF
申请人:COUNCIL OF SCIENTIFIC 7 INDUSTRIAL RESEARCH
公开号:US20150368181A1
公开(公告)日:2015-12-24
The present invention relates to preparation of highly efficient chiral recyclable homogeneous catalysts generated in situ by the reaction of chiral oligomeric [H
4
] ligands and a metal salt taken in 1:1 molar ratio for asymmetric nitroaldol reaction, wherein nitroaldol reactions of various aldehydes such as aromatic, aliphatic α,β-unsaturated aldehydes, alicyclic aldehydes and nitroalkenes were carried out to produce optically active β-nitroalcohols in high yield and with moderate to excellent enantioselectivity (ee up to >95%) in presence of a base and an optically active chiral recyclable homogeneous catalyst represented by the following formula (I).
本发明涉及通过手性寡聚[H4]配体与金属盐在1:1摩尔比下反应生成原位高效手性可回收均相催化剂的制备,用于不对称硝基醛醇反应,其中对各种醛(如芳香族、脂肪族α,β-不饱和醛、脂环醛和硝基烯烃)进行硝基醛醇反应,以高产率和中等到优异对映选择性(ee高达>95%)在碱和以下式(I)所示的手性可回收均相催化剂存在下产生光学活性β-硝基醇。