HIGH STEREOSELECTIVITY IN N,N′-(S,S)-1,2-CYCLOHEXYLENEBIS(SALICYLIDENEIMINATO) (sal2-(S,S)-chxn) COBALT (III) COMPLEXES CONTAINING AMINO ACIDS AND OPTICAL RESOLUTION OF AMINO ACIDS WITH COBALT(II)-sal2-(S,S)-chxn
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A series of new mixed ligand cobalt(III) complexes with the general formula of [Co (sal2-(S,S)-chxn) (aa)] (aa = anion of gly, ala, val, leu, or thr) has been prepared. They take stereoselectively Λ-cis-β1(fac)-structure. The optical resolution of eleven amino acids with cobalt(II)-sal2-(S,S)-chxn complex has been examined. The optical purities of the amino acids resolved in 1 : 2 reaction molar ratio have been 8–50%.
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