Efficient, racemization-free amidation of protected amino acids

Article abstract of DOI:10.1055/s-1992-26093

N-tert-Butoxycarbonyl derivatives of L-leucine, S-benzyl-L-cysteine and N(τ)-(2,4-dinitrophenyl)-L-histidine were amidated with crystalline ammonium, methylammonium, and ethylammonium salts of 3-hydroxy-1,2,3-benzotriazin-4(3H)-one and N-hydroxy-succinimi