title: Facile thiolytic removal of the o-nitrophenylsulphenyl amino-protecting group.
abstract: 2-Mercaptopyridine was used to effect the selective, mild and efficient cleavage of the o-nitrophenylsulphenyl amino-protecting group from several amino acids and peptides. By utilization of this reagent a stepwise synthesis of the tetrapeptide Thr-Lys-Leu-Arg([Leu3]tuftsin) was successfully achieved. The potential use of 2-mercaptopyridine in mechanized peptide synthesis via the polymeric reagents approach is discussed.
mesh_terms: D000596:Amino Acids; D055598:Chemical Phenomena; D002621:Chemistry; D007202:Indicators and Reagents; D010455:Peptides / Q000138:chemical synthesis*; D011108:Polymers; D011725:Pyridines
chemical_list: D000596:Amino Acids; D007202:Indicators and Reagents; D010455:Peptides; D011108:Polymers; D011725:Pyridines