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The hydrochlorides of a-aminoacid esters react with Au 2 Cl 6  in thionyl chloride to give the ammonium salts [H 3 NCHRCO 2 R′]+AuCl 4  -  (R = H , Me, R′ = H , Me, Et). The X-ray structure of [H 3 NCH(Me)CO 2 Me] + AuCl 4  -  has been determined. The reactions of a-aminoacids with Au 2 Cl 6  in SOCl 2  afford mixtures of ammonium tetrachloroaurate(III) salts with a-amino acids, a-amino acid chlorides or a-amino acid anhydrides as amine components. Cysteine esters reduce gold(III) to give the gold(I) compounds [AuSCH 2 CH(N H 2 )CO 2 R] n  (R = Me, Et).

zeitschrift für naturforschung b

Metallkomplexe mit biologisch wichtigen Liganden, XXXIII. Reaktionen von α-Aminosäuren und α-Aminosäurederivaten mit Gold(III)-chlorid/ Metal Complexes with Biological Important Ligands, XXXIII. Reactions of α-Amino Acids and Derivatives there of with Gold(III) Chloride