Chymotrypsin suspended in organic solvents with salt hydrates is a good catalyst for peptide synthesis from mainly undissolved reactants
作者:Peter Kuhl、Peter J. Halling、Hans-Dieter Jakubke
DOI:10.1016/s0040-4039(00)97845-6
日期:1990.1
Chymotrypsin powder suspended in organicsolvents in the presence of Na2CO3.10H2O catalyses peptidesynthesis from X-Ala-Phe-OMe and Leu-NH2 (X = Boc or Z). The reaction proceeds best in the most non-polar solvents, such as hexane, despite the fact that both reactants and products remain largely undissolved. Leu-NH2.HCl can be used in place of the free base.
on the asymmetric induction as well as catalyst efficiency. The chiral centers in AA' and AA' amino acid residues in 5 were also found to have some influence on the catalytic asymmetric induction. Possible mechanism which can accommodate these effects are discussed. Asymmetricreduction of RCOCO-AA-OMe (13) via hydrosilylation was carried out to give chiral depsipeptide units. The asymmetric hydrogenation