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Enantioselective Borohydride Reduction Catalyzed by Optically Active Cobalt Complexes

机译:旋光钴配合物催化对映选择性硼氢化物的还原

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The highly enantioselective borohydride reduction of aromatic ketones or imines to the corresponding alcohols was developed in the presence of a catalytic amount of an optically active cobalt(II)complex catalyst.This enantioselective reduction is carried out using a precisely premodified borohydride with alcohols such as tetrahydrofurfuryl alcohol,ethanol and methanol.High optical yields are obtained by choosing the appropriate alcohol as modifiers and a suitable beta-ketoiminatoligand of the catalyst.The enantioselective borohydride reduction has been successfully applied to the preparation of optically active 1,3-diols,the stereoselective reduction of diacylferrocenes,and dynamic and/or kinetic resolution of 1,3-dicarbonyl compounds.
机译:在催化量的旋光钴(II)络合物催化剂的存在下,芳族酮或亚胺对映体的高度对映选择性硼氢化物得到了发展,这种对映选择性的还原是使用精确预修饰的硼氢化物与醇类(例如四氢糠基)进行的通过选择合适的醇作为改性剂和合适的催化剂β-酮亚氨基配体可以得到高的光学收率。对映选择性硼氢化物还原已成功地用于制备光学活性的1,3-二醇,立体选择性二酰基二茂铁的还原,以及1,3-二羰基化合物的动态和/或动力学拆分。

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