dehydration of primary amides to nitriles efficiently proceeds undermild, aqueous conditions via the use of dichloroacetonitrile as a water acceptor. A key to the design of this transfer dehydration catalysis is the identification of an efficientwater acceptor, dichloroacetonitrile, that preferentially reacts with amides over other polar functional groups with the aid of the Pd catalyst and makes the desired
Peptide ligation by chemoselective aminonitrile coupling in water
作者:Pierre Canavelli、Saidul Islam、Matthew W. Powner
DOI:10.1038/s41586-019-1371-4
日期:2019.7
N-to-C peptide ligation. Our model unites prebiotic aminonitrile synthesis and biological α-peptides, suggesting that short N-acyl peptide nitriles were plausible substrates during early evolution.Prebiotic peptide formation is achieved through chemoselective, high-yielding ligation of α-aminonitriles in water, showing selectivity for α-peptide coupling and tolerance of all proteinogenic amino acid residues
An efficient asymmetric hydrogenation of [small alpha]-amino acrylonitriles has been achieved, affording chiral [small alpha]-amino nitriles in excellent yields and enantioselectivities regardless of the cis-trans configuration of [small alpha]-amino acrylonitriles.