title: Kinetically controlled synthesis of monoglyceryl esters from chiral and prochiral acids methyl esters catalyzed by immobilized Rhizomucor miehei lipase.
abstract: Partial acylation of only one primary hydroxyl group of glycerol generates a chiral center at position 2. Rhizomucor miehei lipase (RML) catalyzes the kinetically controlled transesterification of different aromatic carboxylic acids methyl esters with glycerol. High synthetic yields of glyceryl esters (around 70-80%) were obtained even in the presence of significant concentrations of water (from 5% to 20%). After a long incubation of the reaction mixture in the presence of the biocatalyst only pure free acid was obtained. Other lipases (from Geobacillus thermocatenulatus and from Thermomyces lanuginose) also catalyzed similar kinetically controlled transesterifications although less efficiently. RML immobilized on Sepharose-Q showed a high activity and specificity, compared to the immobilization by other techniques, only producing monoglyceryl esters with all substrates. In particular, monoglyceryl-phenylmalonate product was synthesized in 82% overall yield and >99% diastereomeric excess at pH 7.0 and 37°C and 90% glycerol.
authors.affiliation: Departamento de Biocatálisis, Instituto de Catálisis (CSIC), Spain.
authors.forename: Andreina
authors.initials: A
authors.lastname: Acosta
authors.forename: Marco
authors.initials: M
authors.lastname: Filice
authors.forename: Gloria
authors.initials: G
authors.lastname: Fernandez-Lorente
authors.forename: Jose M
authors.initials: JM
authors.lastname: Palomo
authors.forename: Jose M
authors.initials: JM
authors.lastname: Guisan
mesh_terms: D055162:Biocatalysis; D001709:Biotechnology / Q000379:methods*; D002264:Carboxylic Acids / Q000737:chemistry / Q000378:metabolism*; D004800:Enzymes, Immobilized / Q000378:metabolism; D004951:Esterification; D004952:Esters / Q000138:chemical synthesis*; D005990:Glycerol / Q000138:chemical synthesis*; D007700:Kinetics; D008049:Lipase / Q000378:metabolism*; D020103:Rhizomucor / Q000201:enzymology*; D013237:Stereoisomerism; D013379:Substrate Specificity
chemical_list: D002264:Carboxylic Acids; D004800:Enzymes, Immobilized; D004952:Esters; D008049:Lipase; D005990:Glycerol