A group of modified (salen)Cr(III)Cl complexes with bulky benzylic substituents in the 3,3′-position of the salicylidene moiety have been successfully applied for the asymmetric nitroaldolreaction. The readily accessible complex bearing 3-phenylpent-3-yl groups (2 mol %) leads to β-nitro alcohols in up to 92% yield and 94% ee.
Sterically hindered, regenerable Schiff base complexes, solutions
申请人:Bend Research, Inc.
公开号:US05266283A1
公开(公告)日:1993-11-30
There are disclosed saltmen-type metallo Schiff base complexes and oxygen-sorbing and -desorbing solutions of the same, pressure- and temperature-swing oxygen separation processes using the complexes and solutions, and methods of regenerating such complexes and solutions.