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Platinum(I1) has been proven to be an effective amino protecting group of a-amino acids. A series of reactions at the carboxylic group of N-coordinated a-amino acids has been carried out to give platinum(I1) complexes with peptide esters, a-amino acid amides and anhydrides and very reactive a-amino acid chlorides as ligands. Peptide synthesis at platinum(I1) and removal of platinum(I1) by hydrogenation with hydrogen proceeds practically without racemisation. Platinum(I1) and palladium(I1)doi:10.1351/pac198860081357 fatcat:v6t5mjpc2vgbto6phx2oa2hbeu