title: N-acylation during the addition of carboxylic acids to N-tert-Butylacylketenimines and the use of the reagent N-tert-Butyl-5-methylisoxazolium Perchlorate for Peptide Synthesis.
mesh_terms: D000215:Acylation; D002264:Carboxylic Acids; D007202:Indicators and Reagents; D008722:Methods; D009861:Onium Compounds; D010080:Oxazoles; D010455:Peptides / Q000138:chemical synthesis*
chemical_list: D002264:Carboxylic Acids; D007202:Indicators and Reagents; D009861:Onium Compounds; D010080:Oxazoles; D010455:Peptides