Enzyme-catalysed synthesis of peptides containing D-amino acids
作者:J. Blair West、Chi-Huey Wong
DOI:10.1039/c39860000417
日期:——
Practical procedures are described for the preparation of D-amino acid-containing dipeptides using α-chymotrypsin and the Met(O)192-modified enzyme as a catalyst.
Design, Synthesis, and Application of Enantioselective Coupling Reagent with a Traceless Chiral Auxiliary
作者:Beata Kolesinska、Zbigniew J. Kaminski
DOI:10.1021/ol802691x
日期:2009.2.5
Stable chiral N-triazinylbrucinium tetrafluoroborate enantioselectively activates racemic carboxylic acids yielding enantiomerically enriched amides, esters, and dipeptides with er from 8:92 to 0.5:99.5. Due to the departure of a chiral auxiliary after the activation of the carboxylic function, all of the subsequent stages of the coupling reaction proceed without any perturbation caused by a chirality discriminator (traceless). Therefore, the advantageous coupling conditions, configuration, and enantiomeric purity of the final product are entirely predictable from the model experiment.