摘要:
                                A base labile urethane (Bnpeoc) group derived from 2,2-bis(4'-nitrophenyl)ethan-1-ol has been developed as an amine protecting group.  This protecting group may be cleaved using the reagents, DBN, DBU, DBU/HOAc and piperidine.  The preparations of N-alpha-Bnpeoc amino acids and applications to peptide/glycopeptide synthesis are described.