ENZYMATIC SYNTHESIS OF ENANTIOMERICALLY ENRICHED DERIVATIVES OF CIS- AND TRANS-CYCLOPENTANE-1,2-DIAMINES
申请人:EntreChem, S.L.
公开号:EP2319825A1
公开(公告)日:2011-05-11
SUMMARY
The present invention relates to the enzymatic resolution of cis-and trans-cyclopentane-1,2-diamine derivatives to obtain enantiomerically pure or enriched compounds, a method for the preparation of the starting materials of that procedure, the products of this procedure and its transformation into products of commercial interest.
Immobilized Manihot esculenta preparation as a novel biocatalyst in the enantioselective acetylation of racemic alcohols
作者:Luciana L. Machado、Telma L.G. Lemos、Marcos Carlos de Mattos、Maria da Conceicão F. de Oliveira、Gonzalo de Gonzalo、Vicente Gotor-Fernández、Vicente Gotor
DOI:10.1016/j.tetasy.2008.05.018
日期:2008.6
The enzymatic preparation obtained from a discard of Manihot esculenta roots has been successfully immobilized on calcium alginate hydrogels. This preparation has been tested as a chiral biocatalyst in the enzymatic acylation of a set of racemic aromatic alcohols. Depending on the reaction conditions, excellent enantioselectivities can be achieved. Some parameters that can alter the biocatalytic properties of the enzyme, such as solvent, temperature, acyl donor and substrate structure have been studied exhaustively in order to establish a deeper knowledge of this novel biocatalyst. (C) 2008 Elsevier Ltd. All rights reserved.
Kinetic resolution of (±)-trans- and (±)-cis-2-phenylcyclopentanamine by CALB-catalyzed aminolysis of esters: the key role of the leaving group
Kinetic resolution of (+/-)-trans- and (+/-)-cis-2-phenylcyclopentanamine is effectively performed by lipase B from Candida antarctica, (CALB)-catalyzed aminolysis reaction. Whereas reaction between (+/-)-trans-2-phenylcyclopentanamine and ethyl acetate proceeds with a very high E value (>200) and conversion (50%), the corresponding acetylation of ()-cis-2-phenylcyclopentanamine happens with low E value (16) and conversion (28%). Nevertheless, this problem is overcome using other acyl donors such as (+/-)-1-phenylethyl and (+/-)-cis-2-phenylcyclopentyl methoxyacetates. The influence of the acyl donor on the CALB-catalyzed aminolysis of (+/-)-cis-2-phenylcyclopentanamine is also studied. (C) 2003 Elsevier Ltd. All rights reserved.
GLYOXYLIC COMPOUND COMPRISING ONE OR MORE ACTIVE INGREDIENT