摘要:
Optically active chromium aminocarbene complexes were alpha-alkylated and then photolyzed in the presence of 2,4,5-trichlorophenol to produce a number of optically active activated alpha-amino esters. These underwent coupling with amino acid esters or a soluble PEG-supported dipeptide to introduce the chromium-carbene-complex-derived amino acid residue into the peptide.