directly introduce these acyl moieties by an enzyme-catalyzed reaction of 2a with the corresponding activated esters. This new approach was based on the regioselective introduction of a methyl malonate residue at the CH2OH of the sugar moiety by catalysis with the protease subtilisin ( 22a). The mixed diester 22a was then subjected to chemoselective hydrolysis of the methoxycarbonyl function by another
The coupling efficiency in alpha-chymotrypsin-catalysed peptide synthesis is greatly improved by the use of activated esters such as the 2,2,2-trifluoroethyl ester as acyl donor instead of the conventional methyl ester; this approach Is useful for the incorporation of non-protein amino acids into peptides.
MARGOLIN, ALEXEY L.;TAI, DAR-FU;KLIBANOV, ALEXANDER M., J. AMER. CHEM. SOC., 109,(1987) N 25, 7885-7887
作者:MARGOLIN, ALEXEY L.、TAI, DAR-FU、KLIBANOV, ALEXANDER M.
DOI:——
日期:——
α-Chymotrypsin-catalysed peptide synthesis via the kinetically controlled approach using activated esters as acyl donors in organic solvents with low water content: incorporation of non-protein amino acids into peptides
α-chymotrypsin-catalysed peptide synthesis via the kinetically controlled approach is greatly improved by the use of activated esters such as the 2,2,2-trifluoroethyl ester as acyl donors instead of the conventional methyl ester in organicsolvents such as acetonitrile with low water content. This approach is useful for the incorporation of non-protein amino acids such as halogenophenylalanines into peptides.