Reaktionen an der α‐Methylengruppe von (Glycinato)platin(II)‐Chelat‐Komplexen

The palladium‐mediated coupling of p‐ethynylphenylalanine (p‐epa) with different halogenated benzenes yielded alkyne‐bridged α‐amino acids. A series of cationic mono‐ to hexanuclear (Ph3P)2Pt complexes with the anions of p‐ethynylphenylalanine and alkynyl‐ or benzene‐bridged di‐, tri‐, tetra‐ and hexa‐ethynyl phenylalanines as N,O‐chelate ligands was prepared. N‐t‐Boc‐p‐ethynylphenylalanine methyl ester was metal‐substituted to give complexes of the types Ph3PAu‐C≡C–R and (Et3P)2Pt(C≡CR)2. The benzene‐bridged di‐, tri‐, tetra‐ and hexa‐p‐ethynylphenylalanine methyl esters form Schiff bases with ferrocene aldehyde and a tripodal ligand was obtained from Ph2PCH2CH2CH2NH2 and the benzene‐bridged tri‐ethynylphenylalanine. The structure of (Ph3P)2Pt[NH2C(H)(CH2C6H4C≡CH)CO2]+ BF4− was determined by X‐ray diffraction.

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“…[16] [17] [18] [19] by a heteroatom [6] or the iodo substituent was replaced by sulfur-containing fragments or trimethyltin [7] . The pal-…”

Section: Resultsmentioning

confidence: 99%

Metal Complexes of Alkyne-Bridged α-Amino Acids

Kayser

Altman

Nöth

et al. 1998

Eur. J. Inorg. Chem.

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Metallkomplexe mit N,N‐Bis (diphenylphosphino)‐ α‐aminosäureestern

et al. 1978

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Mit den aus a-Aminosaureestern und Chlordiphenylphosphin erhaltenen, optisch aktiven Titelliganden werden eine Reihe von Metallkomplexen von Palladium(II), Platin(II), Rhodium(1) sowie von Chrom-, Molybdan'-, Wolfram-und Mangancarbonylen und deren spektroskopische Daten beschrieben. Die P -N-Bindung in den freien Liganden laljt sich mit HCl spalten, Bis(dipheny1phosphino)glycin-methylester an der CH,-Gruppe monoalkylieren. Metal Complexes with N,N-Bis(diphenylphosphin0)-a-amino Acid EstersA series of metal complexes of palladium(II), platinum(II), rhodium(1) and carbonyl complexes of chromium, molybdenum, tungsten and manganese with the optically active title ligands (obtained from a-amino acids and chlorodiphenylphosphine) is described. The P -N-bond of the free ligands is cleaved by HCI; bis(dipheny1phosphino)glycine methylester can be monoalkylated at the CH2 group.

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