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Copper Complex of Aminoisoborneol Schiff Base Cu

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Abstract

A new bifunctional copper complex of the aminoisoborneol Schiff base – Cu2(SBAIB‐d)2 – has been developed for the effective direct catalytic asymmetric Henry reaction. One mol% of this catalyst produces the expected Henry products in high yields (up to 99%) with excellent enantioselectivities (up to 98% ee). The utility of the present catalyst was also extended to the Henry reaction with nitroethane and 1‐nitropropane that furnished the corresponding products in moderate to high yields (up to 99%) with moderate to high enantioselectivities of syn (up to 98% ee) and anti (up to 98% ee) diastereomers. The highlights of this catalytic system are easy manipulation, air and moisture tolerance, the need for 1 mol% of an easily synthesizable catalyst and the high enantioselectivities achieved for a wide range of substrates.
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Document Type: Research Article

Affiliations: 1: Department of Chemistry, National Dong Hwa University, Soufeng, Hualien 974, Taiwan, Republic of China, Fax: (+886)-3-836-0475 2: Instrumentation Center, College of Science, National Taiwan University, Taipei 106, Taiwan, Republic of China

Publication date: 2012-09-17

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