There is provided a production method for producing a biarylalanine compound of formula (4):
1
wherein R
1
represents a amino protective group and R
2
represents an amino protective group or a hydrogen atom, R
3
is a carboxy protective group, or the like, and
R
4
is a substituted or unsubstituted aryl or heteroaryl group, characterized by reacting an aromatic amino acid of formula (1)
2
wherein X is a halogen atom or a trifluoromethanesulfonyloxy group, and R
1
, R
2
and R
3
has the same meaning as defined above, with an organic boron compound of formula (2):
3
wherein R
4
has the same meaning as defined above, and Q
1
and Q
2
are the same or different and each is a hydroxy group, an alkoxy group having 1 to 4 carbon atom(s), in the presence of nickel catalyst and a base.
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.
US7091373B2
申请人:——
公开号:US7091373B2
公开(公告)日:2006-08-15
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.