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RECYCLABLE CHIRAL CATALYST FOR ASYMMETRIC NITROALDOL REACTION AND PROCESS FOR THE PREPARATION THEREOF

机译:不对称硝基硝基反应的可回收手性催化剂及其制备方法

摘要

The present invention relates to preparation of highly efficient chiral recyclable homogeneous catalysts generated in situ by the reaction of chiral oligomeric [H4] 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, a,-unsaturated aldehydes, alicyclic aldehydes and nitroalkenes were carried out to produce optically active -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 (1).
机译:本发明涉及通过手性低聚[H4]配体与以1:1摩尔比的金属盐反应用于不对称硝基醛醇缩合反应的原位生成的高效手性可循环均相催化剂的制备,其中各种醛类的硝基醛醇缩合反应例如在存在碱和旋光性手性化合物的情况下,进行了芳族,脂肪族,α-不饱和醛,脂环族醛和硝基烯烃的制备,以高收率和中等至优异的对映选择性(ee高达> 95%)生产旋光性硝基醇。下式(1)表示的可回收均相催化剂。

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