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  • 1
    Electronic Resource
    Electronic Resource
    Metallkomplexe mit biologisch wichtigen Liganden, XXXIV. Allyl-Palladium(II)- und Triphenylphosphan-Gold(I)-Komplexe mit Nucleobasen und Nucleosiden (1985)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 118 (1985), S. 931-942 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Metal Complexes with Biologically Important Ligands, XXXIV. Allyl-Palladium(II) and Triphenylphosphane Gold(I) Complexes with Nucleobases and NucleosidesThe reactions of (η3-allyl)Pd(μ-Cl)2Pd(η3-allyl) (A) and (COD)Rh(μ-Cl)2Rh(COD) with nucleobases and nucleosides give the complexes (η3-C3H5)Pd(L)Cl (1) (L = inosine, adenosine, guanosine, cytosine, cytidine, 2-thiouracil, 2-thiocytosine) and (COD)Rh(cytosine)Cl (2), respectively. With adenosine and purine also ligand bridged complexes (η3-C3H5)(Cl)Pd—L—Pd(Cl)(η3-C3H5) (3) have been obtained. Ph3PAuCl reacts with the anions L′ of purine, adenine, uridine, and inosine to give the complexes Ph3PAuL′ (5). Ph3PAu+ is added to both N atoms of the dianion of uracil with formation of 6. The coordination of the nucleobases is discussed on the basis of the 1H and 13C NMR spectra. The X-ray structure of Ph3PAu(adeninate) (5b) has been determined.
    Notes: Die Umsetzung von (η3-Allyl)Pd(μ-Cl)2Pd(η3-Allyl) (A) sowie von (COD)Rh(μ-Cl)2Rh(COD) mit Nucleobasen und Nucleosiden liefert unter Spaltung der Chlorobrücken die Komplexe (η3C3H5)-Pd(L)Cl (1) (L = Inosin, Adenosin, Guanosin, Cytosin, Cytidin, 2-Thiouracil, 2-Thiocytosin) bzw. (COD)Rh(Cytosin)Cl (2). Mit Adenosin und Purin wurden auch Ligand-verbrückte Komplexe (η3-C3H5)(Cl)Pd—L—Pd(Cl)(η3-C3H5) (3) erhalten. Ph3PAuCl setzt sich mit den Anionen L′ von Purin, Adenin, Uridin und Inosin zu Ph3PAuL′ (5) um; Ph3PAu+ addiert sich an die beiden N-Atome des Dianions von Uracil unter Bildung von 6. Die Koordination der Nucleobasen wird anhand der 1H- und 13C-NMR-Spektren diskutiert. Die Struktur von Ph3PAu (Adeninat) (5b) wurde röntgenographisch bestimmt.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19851180311
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  • 2
    Electronic Resource
    Electronic Resource
    Dichloropalladium(II)-Komplexe mit α-Aminosäuren, α-Aminosäureestern, Dipeptiden und Dipeptidestern (1984)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 117 (1984), S. 1003-1012 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Dichloropalladium(II) Complexes with α-Amino Acids, α-Amino Acid Esters, Dipeptides, and Dipeptide EstersA series of trans-dichloropalladium(II) complexes Cl2PdL2 (L = α-amino acid, α-amino acid ester, dipeptide, dipeptide esters) and cis-Cl2Pd(histidine) has been prepared and spectroscopically characterized. The X-ray structure of trans-Cl2Pd(GlyOEt)2 (3b) has been determined.
    Notes: Eine Reihe von trans-Dichloropalladium(II)-Komplexen Cl2PdL2 mit (L = α-Aminosäure, α-Aminosäureester, Dipeptid, Dipeptidester) sowie cis-Cl2Pd(Histidin) wurde dargestellt und spektroskopisch charakterisiert. Die Röntgenstruktur von trans-Cl2Pd(GlyOEt)2 (3b) wurde bestimmt.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19841170314
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  • 3
    Electronic Resource
    Electronic Resource
    Enantioselektive katalytische Hydrierung von α-(Acetylamino)-zimtsäure mit einem Rhodium-Phosphankomplex in wäßriger Lösung (1986)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 119 (1986), S. 1731-1733 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Enantioselective Catalytic Hydrogenation of α-(Acetylamino)cinnamic Acid with a Rhodium Phosphane Complex in Aqueous SolutionThe synthesis of [(3R,4R)-3,4-bis(diphenylphosphino)-1,1-dimethylpyrrolidinium-P,P′](1,5-cyclooctadiene)rhodium bis(tetrafluoroborate) (5) is described. With this water-soluble catalyst the sodium salt 6c of α-(Acetylamino)cinnamic acid (6a) is hydrogenated in aqueous solution to give (S)-N-acetylphenylalanine with 90% ee.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19861190525
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  • 4
    Electronic Resource
    Electronic Resource
    Metallorganische Lewis-Säuren, XXXI Reaktionen von Pentacarbonyl(tetrafluoroborato)rhenium mit neutralen und anionischen organischen Cyanverbindungen (1987)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 120 (1987), S. 895-900 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: (OC)5ReFBF3 reacts with ethyl thiocyanate, malononitrile, cyanamide, and dicyandiamide (L) to give the ionic complexes [(OC)5ReL]+BF-4 (1). Two or three Re(CO)-3 cations, respectively, can be added to tetracyanoethene and tetracyano-p-quinodimethane (TCNQ) to give 2, 3. With the anions of tricyanoethenolate, TCNQ-, tricyanomethanide and dicyanamide (L-) the neutral compounds (OC)5ReL (4-7) are formed. The IR spectra and the X-ray structure analyses of [(OC)5Re(NCNC(NH2)2]+BF -4 (1d), (OC)5ReNCC(CN)2 (6), and of (OC)5ReNCNCN (7) show that the ligands are coordinated in all cases via the nitrile N-atom to the metal.
    Notes: (OC)5ReFBF3 setzt mit Ethylthiocyanat, Malononitril, Cyanamid und Dicyandiamid (L) zu den ionogenen Verbindungen [(OC)5ReL]+BF-4 (1) um. An Tetracyanethen sowie an Tetracyan-p-chinodimethan lassen sich zwei bzw. drei Re(CO)-3-Kationen unter Bildung von 2 und 3 addieren. Mit den Anionen Tricyanethenolat, TCNQ-, Tricyanmethanid und Dicyanamid (L-) entstehen die Neutral-Komplexe (OC)5ReL (4-7). Die IR-Spektren sowie die Röntgenstrukturanalysen von [(OC)5Re(NCNC(NH2)2]+BF -4 (1d), (OC)5ReNCC(CN)2 (6) und (OC)5ReNCNCN (7) zeigen, daß die Liganden in allen Fällen über das Nitril-N-Atom an das Metall koordiniert sind.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19871200605
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  • 5
    Electronic Resource
    Electronic Resource
    Enantioselektive Katalyse, 5. Neue Liganden mit vier Stereozentren. Synthese und Trennung der drei diastereomeren [P(R,S),3R,4R,P′(R,S)]-3,4-Bis(methylphenylphosphino)-pyrrolidine (1988)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 121 (1988), S. 1123-1131 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Enatioselective catalysis, 5.  -  New Ligands with four Stereogenic Centers. Synthesis and Separation of the Separation of the three Diastereomeric [P(R,S),3R,4R,P′(R,S]-3,4-Bis(methylphenylphosphino)-pyrrolidinesFrom (3R,4R)-3,4-bis(diphenylphosphino)pyrrolidine (1a) or the N-benzyl derivative 1b [P(R,S),3R,4R,P′-(R,S)]-3,4-bis(phenylphosphino)pyrrolidin (2a-*) resp. its N-benzyl derivative 2b-* were prepared as diastereomeric mixture. From 2a-* isomerically pure (PR,3R,4R,P′S)-3,4-bis(benzylphenyl-phosphino)pyrrolidin (3a-3) was prepared. [P(R,S), 3R,4R, P′(R,S)]-3,4-bis(methylphenylphosphino)pyrrolidin (4a-*), obtained from 2a-*, was a mixture of the three possible diastereomers. This mixture could be separated through the palladium complexes of the N-tert-butoxycarbonyl derivatives 8c-*. [(PS, 3R4R,P′S)-1-(tert-Butoxycarbonyl)-3,4-bis(methylphenylphosphino) pyrrolidin-P,P′]diiodopalladium(II) (8c-1) and for comparison [(3R,4R)-1-benzyl-3,4-bis(diphenylphosphino) pyrrolidine-P,P′](1,5-cyclooctadiene)rhodium(I) tetrafluoroborate (11) were characterised by X-ray crystallography.
    Notes: Ausgehend von (3R,4R)-3,4-Bis(diphenylphosphino)pyrrolidin (1a), bzw. dem N-Benzyl-Derivat 1b wurden [P(R,S),3R,4R,P′-(R,S)]-3,4-Bis(phenylphosphino)pyrrolidin (2a-*) und dessen N-Benzyl-Derivat 2b-* als Diastereomerengemische hergestellt. Aus 2a-* wurde isomerenreines (PR,3R,4R,P′S)-3,4-Bis(benzylphenyl-phosphino)pyrrolidin (3a-3) dargestellt. [P(R,S), 3R,4R, P′(R,S)]-3,4-Bis(methylphenylphosphino)pyrrolidin (4a-*) wurde aus 2a-* als Diastereomerengemisch erhalten, dessen Auftrennung über die Palladiumkomplexe der N-tert-Butoxycarbonyl-Derivate 8c-* gelang. [(PS, 3R4R,P′S)-1-(tert-Butoxycarbonyl)-3,4-bis(methylphenylphosphino) pyrrolidin-P,P′]diiodopalladium(II) (8c-1) und zum Vergleich [(3R,4R)-1-Benzyl-3,4-bis(diphenylphosphino)pyrrolidin-P,P′] (1,5-cyclooctadien)rhodium(I)-tetrafluoroborat (11) wurden durch Röntgenstrukturanalyse charakterisiert.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19881210617
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  • 6
    Electronic Resource
    Electronic Resource
    Addition von metalloganischen Nucleophilen an Koordinierte 1,3-Diene, Trimethylenmethan und Cycloheptatrienyl: Heterobimetallische carbonyl Molybdän-Rhenium-Komplexe mit σ,π-C4- und-C7-Kohlenwasserstoffbrücken (1989)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 122 (1989), S. 2031-2031 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19891221035
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  • 7
    Electronic Resource
    Electronic Resource
    Enantioselektive Katalyse, IX. Neue optisch reine 3,4-Bis(phosphanyl)pyrrolidine mit Phenyl-und Anisylgruppen sowie deren Palladium-und Rhodiumkomplexe (1993)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 126 (1993), S. 1091-1100 
    Details
    ISSN: 0009-2940
    Keywords: 3,4-Bis(phosphanyl)pyrrolidines ; Palladium complexes ; Rhodium complexes ; Asymmetric hydrogenation ; Phosphanes, chiral ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Enantioselective Catalysis, IX[1]. - New Optically Pure 3,4-Bis(phosphanyl)pyrrolidines with Phenyl and Anisyl Groups Including Their Palladium and Rhodium ComplexesMethods for the synthesis of the diastereomeric mixture of the [P(R,S),3R,4R,P′(R,S)]1-1-(tert1-butoxycarbonyl)1-3,4-bis[(2-methoxyphenyl)phenylphosphanyl]pyrrolidines (2a, b, c) are described. For the chromatographic separation and purification of the ligand diastereomers we transformed them into the PdI21-complexes (10a, b, c). The structure of (PR,3R,4R,P′R)1-1-(tert1-butoxycarbonyl)1-3,4-bis[(2-methoxyphenyl)phenylphosphanyl]pyrrolidine-P,P′}diiodopalladium (10 b) was determined by X-ray diffraction. Treatment of the palladium complexes with KCN yielded the pure phosphanes. The rhodium complexes (11a, 11b, 11c), which can be used as catalysts in enantioselective hydrogenations, were obtained by reaction of [Rh(COD)2]BF4 with compound 2a, 2b, or 2c.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19931260505
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  • 8
    Electronic Resource
    Electronic Resource
    Enantioselective Catalysis, XIIIPart XII: U. Nagel, J. Leipold, Chem. Ber., 1996, 129815-821.. Preparative and Structural Chemistry of Chiral 3-(Diphenylphosphanyl)-pyrrolidiens and Their Palladium(II) Complexes (1997)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 130 (1997), S. 385-398 
    Details
    ISSN: 0009-2940
    Keywords: Pyrrolidinephosphanes ; 3-Hydroxypyrrolidine ; 3-Diphenylphosphanylpyronlidine ; Salt effects ; Polymorphism ; Homogeneous catalysis ; Palladium ; Asymmetric catalysis ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The preparation of both enantiomers of 3-diphenylphosphanulpyrrolidiine (2) and several N-substituted derivatives together with two PdIi complexes of this ligand is reported. Form L-malic acid and L-hydroxyproline both enantiomers of 3-hydroxypyrrolidine are prepared without any problems due to epimerization. KPPh2 in the presence of LiCl is shown to be the most effective reagent for the synthesis of 2. The reported X-ray structure determination sof Pdl2 complexes show a rather rigid bicyclic hetero-norbornane skeleton. The flexibility of the other parts of the molecules is obvious in several polymorphs revealed by this method. This polymorphism is additionally investigated by a 31P-CP-MAS study. From solution 1-, 13C- and 31P-NMR studies it is concluded that the bicyclic hetero-norbornane skeleton is retained in solution.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19971300313
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  • 9
    Electronic Resource
    Electronic Resource
    Reaktionen von Glycinato-Verbindungen von Platin(II), Palladium(II) und Kupfer(II) mit Amidacetalen: Schiffbase-Komplexe (1983)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 116 (1983), S. 659-668 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Reactions of Glycinato Compounds of Platinum(II), Palladium(II), and Copper(II) with Amide Acetals: Schiff Base ComplexesA series of Schiff base complexes of platinum(II), palladium(II), and copper(II) 1-4 has been obtained from glycinato chelate compounds and amide acetals. The structure of the complexes has been determined by their IR and NMR spectra, that of 3a by an X ray structure analysis. With trans-bis(glycinato)platinum(II) also reaction with DMF at the α-methylene group of a glycinate ligand has been observed to give a serine derivative as ligand (5), the Schiff base complex 2a being isolated as intermediate. The first step of these reactions always is an attack of the amide acetal at the amino group; the coordinated and activated Schiff base ligands may also react at the α-methylene group.
    Notes: Eine Reihe von Schiffbase-Komplexen von Platin(II), Palladium(II) und Kupfer(II) 1-4 wird aus Glycinato-Chelatkomplexen und Amidacetalen erhalten. Die Struktur der Verbindungen wird spektroskopisch, die von (3a) durch Röntgenstrukturanalyse bestimmt. Bei trans-Bis(glycinato)platin(II) wird mit DMF auch Reaktion an der α-Methylengruppe eines Glycinat-Linganden unter Bildung eines Serinderivats als Liganden (5) beobachtet, wobei der Bis(Schiffbase)-Komplex 2a als Zwischenprodukt isoliert werden kann. Amidacetale greifen (Glycinato)platin(II)-Komplexe primär stets an der Aminogruppe an, erst im zweiten Schritt kann die Reaktion an der α-Methylengruppe des koordinierten Schiffbase-Liganden erfolgen.
    Additional Material: 5 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19831160224
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  • 10
    Electronic Resource
    Electronic Resource
    Metallkomplexe mit biologisch wichtigen Liganden, XXXVIII. Komplexe von Platin(II), Palladium(II), Nickel(II) und Kupfer(II) mit 1-Amino-1-cyclopropancarbonsäure-Derivaten (1985)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 118 (1985), S. 3258-3267 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Metal Complexes with Biologically Important Ligands, XXXVIII. Complexes of Platinum(II), Palladium(II), Nickel(II), and Copper(II) with 1-Amino-1-cyclopropanecarboxylic Acid DerivativesMetal complexes with the anion of 1-amino-1-cyclopropanecarboxylic acid (2a - d), its ethyl ester (3a - c), with Schiff bases from this α-amino acid and amide acetal (4a - d), pyruvic acid (5a - d), and salicylaldehyde (6a - c, 7a,b), respectively, have been prepared. The compounds are characterized by their spectra. The X-ray structure analysis at -90°C of 3a shows nearly equal C - C bond lengths for the cyclopropane ring.
    Notes: Die Darstellung von Metallkomplexen mit dem Anion von 1-Amino-1-cyclopropancarbonsäure (2a - d), mit dessen Ethylester (3a - c), mit Schiff-Basen aus dieser α-Aminosäure und Amidacetal (4a - d), Brenztraubensäure (5a - d) und Salicylaldehyd (6a - c, 7a,b) wird beschrieben. Die Verbindungen werden spektroskopisch charakterisiert. Die bei -90°C durchgeführte Röntgenstrukturanalyse von 3a zeigt annähernd gleiche C - C-Abstände im Cyclopropanring.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19851180825
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