Resolution of N-protected cis- and trans-3-aminocyclohexanols via lipase-catalyzed enantioselective acylation in organic media
摘要:
The enzymatic acylation of N-protected cis- and trans-1,3-aminocyclohexanols using lipases in organic solvents is described. By modifying certain reaction parameters Such as the solvent, the lipase and the N-protecting group, it is possible to achieve high enantioselectivities and to obtain enantiomerically pure 3-aminocyclohexanols. The influence of the N-protecting group and the conformation of the Substrate on the reaction rate was also Studied. (C) 2004 Elsevier Ltd. All rights reserved.
Resolution of N-protected cis- and trans-3-aminocyclohexanols via lipase-catalyzed enantioselective acylation in organic media
摘要:
The enzymatic acylation of N-protected cis- and trans-1,3-aminocyclohexanols using lipases in organic solvents is described. By modifying certain reaction parameters Such as the solvent, the lipase and the N-protecting group, it is possible to achieve high enantioselectivities and to obtain enantiomerically pure 3-aminocyclohexanols. The influence of the N-protecting group and the conformation of the Substrate on the reaction rate was also Studied. (C) 2004 Elsevier Ltd. All rights reserved.
Diastereoisomeric Salt Formation and Enzyme-Catalyzed Kinetic Resolution as Complementary Methods for the Chiral Separation of <i>cis</i>-/<i>trans</i>-Enantiomers of 3-Aminocyclohexanol
作者:Cara E. Brocklehurst、Kurt Laumen、Luigi La Vecchia、Duncan Shaw、Markus Vögtle
DOI:10.1021/op1002424
日期:2011.1.21
enzymatic kinetic resolution of Cbz-protected 3-aminocyclohexanols or direct diastereoisomeric salt formation with (R)-mandelic acid. The salt formation demonstrates how a single enantiomer, (1S,3S)-3-aminocyclohexanol (R)-mandelate, can be effectively isolated from the cis/trans racemic mixture and subsequently converted to the free amine, (1S,3S)-3-aminocyclohexanol, by ion-exchange chromatography.