Library

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    Reaktionen von Komplexliganden, XI: Stereoselektivität der Einschiebung von Inaminen in die Chrom-Carbenkohlenstoff-Bindung: erster Schritt einer zweistufigen Synthese von Indanon- und Indenon-Derivaten (1978)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 111 (1978), S. 2059-2063 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Reactions of Complex Ligands, XI: Stereoselectivity of the Insertion of Ynamines into the Chromium Carbene Bond: First Step of a Two-Step Synthesis of Indanone and Indenone DerivativesPentacarbonyl[methoxymethyl(or phenyl)carbene]chromium (1, 2) reacts with 1-(dialkylamino)-acetylenes (3, 4) in a stereoselective way to give E- and Z-pentacarbonyl(alkenylaminocarbene)-chromium complexes (5-7) via insertion of the alkyne into the metal-carbene bond. The thermolysis of pentacarbonyl[(diethylamino)-E-(β-methoxy-α-methylstyryl)carbene]chromium (7a) in n-decane results in the formation of the tricarbonylchromium complexes of 2-methyl-1-indenone (8) and trans-3-methoxy-2-methyl-1-indanone (9).
    Additional Material: 3 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19781110543
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Reaktionen von Komplexliganden, XXIII. Bis(phosphino)inden-Derivate durch C—C-Verknüpfung von Arylcarben-Liganden und Bis(diphenylphosphino)acetylen (1983)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 116 (1983), S. 2337-2343 
    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 Complex Ligands, XXIII. Bis(phosphino)indene Derivatives from Carbon Carbon Bond Formation between Arylcarbene Ligands and Bis(diphenylphosphino)acetylenePentacarbonyl(methoxyphenylcarbene) complexes of chromium and tungsten (1a, 2a) react with bis(diphenylphosphino)acetylene (3) via CO substitution to give binuclear alkyne bridged bis(carbene) complexes (CO)4[CH3O(C6H5) C]M-[(C6H5)2P-C ≡ C-P(C6H5)2]-M(CO)4[C(OCH3)C6H5](4a, 5a). The chromium compound 4a is cleaved on warming to yield the tetracarbonyl-[1,2-bis(phosphino)indene]chromium complex 6a and la. In a one-pot reaction the bis(phosphino)indene derivatives 6a-c are formed directly from arylcarbene chromium complexes (CO)5Cr[C(p-RC6H4)OCH3] (R=;H, CH3, CF3) (1a-c) and 3. The structure of 6c is established by X-ray analysis.
    Notes: Pentacarbonyl(methoxyphenylcarben)-Komplexe des Chroms und Wolframs (1a, 2a) reagieren mit Bis(diphenylphosphino)acetylen (3) unter CO-Substitution zu den zweikernigen alkin-verbrückten Bis(carben)-Komplexen (CO)4[CH3O(C6H5) C]M-[(C6H5)2P-C ≡ C-P(C6H5)2]-M(CO)4[C(OCH3)C65](4a, 5a). Die Chrom-Verbindung 4a wird beim Erwärmen in den Tetracarbonyl [1,2-bis(phosphino)inden]chrom-Komplex 6a und 1a gespalten. Aus den Arylcarben-Chrom-Komplexen (CO)5Cr[Cp-RC6H4)OCH3] (R=;H, CH3, CF3) (1a-c) und 3 entstehen direkt die 1,2-Bis(phosphino)inden-Derivate 6a-c. Der Molekülbau von 6c wird durch eine Röntgenstrukturanalyse belegt.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19831160622
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Reaktionen von Komplexliganden, XVII. Regiospezifische Reaktion von 1,4-Eninen mit Pentacarbonyl-(methoxyphenylcarben)chrom(0): Darstellung von allyl-substituierten 1-Naphthol- und 1,4-Naphthochinon-Derivaten (1980)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 113 (1980), S. 2876-2883 
    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 Complex Ligands, XVII. Regiospecific Reaction of 1,4-Enynes with Pentacarbonyl(methoxyphenylcarbene)chromium(0): Preparation of Allyl-substituted 1-Naphthol- and 1,4-Naphthoquinone DerivativesPentacarbonyl(methoxyphenylcarbene)chromium(0) (1) and the enynes 2-5 react on warming in di-n-butyl ether to give the tricarbonyl(2(or 3)-alkyl-3(or 2)-allyl-4-methoxy-1-naphthol)chromium(0) complexes 6-9. Chromatography of these compounds on silica gel under atmospheric conditions results in decomplexation and formation of a naphthol- (9 → 11) or a 1,4-naphtho-quinone derivative (8 → 10). Oxidation of 6-9 with silver(I) oxide leads exclusively to the quinones 12-14 and their tricarbonylchromium complexes 15-17. The products are characterized by spectroscopic methods.
    Notes: Pentacarbonyl(methoxyphenylcarben)chrom(0) (1) reagiert mit den 1,4-Eninen 2-5 beim Erwärmen in Di-n-butylether zu den Tricarbonyl(2(bzw. 3)-alkyl-3(bzw.2)-allyl-4-methoxy-1-naphthol)-chrom(0)-Komplexen 6-9. Diese werden bei Luftzutritt an Kieselgel zum Naphthol- (9 → 11) oder direkt zum 1,4-Naphthochinon-Derivat (8 → 10) dekomplexiert. Die Oxidation von 6-9 mit Silber(I)-oxid führt stets zu den Chinonen 12-14 und deren Tricarbonylchrom-Komplexen 15-17. Die Reaktionsprodukte werden spektroskopisch charakterisiert.
    Additional Material: 5 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19801130906
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Reaktionen von Komplexliganden, XXI1) Konkurrierende Olefinspaltung und Cyclopropanierung von Enaminen bei der Umsetzung mit Carben-komplexen (1981)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 114 (1981), S. 1980-1982 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Reaction of Complex Ligands, XXI1) Competing Olefin Scission and Cyclopropanation of Enamines in the Reaction with Carbene ComplexesPentacarbonyl(methoxyphenylcarbene)chromium (1) reacts with 1-phenyl-1-piperidinoethene (2) to give both 1-methoxy-1,2-diphenyl-2-piperidinocyclopropane (3) and pentacarbonyl(phenyl-piperidinocarbene)chromium (4. The reaction of 1 with 1-pyrrolidino-1-cyclopentene (5) leads to insertion of the alkene into the metal carbene bond with formation of 6.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19811140538
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Vitamin-Synthesen mit Carben-Komplexen, II. Carbonyl(carben)-Komplex-induzierte Synthese von Vitaminen der K1- und K2-Reihe (1982)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 115 (1982), S. 1278-1285 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Vitamin Syntheses via Carbene Complexes, II. Carbonyl Carbene Complex Induced Synthesis of Vitamins of the K1 and K2 SeriesPentacarbonyl(methoxyphenylcarbene)chromium(0) (1) reacts with the isoprenoid enynes 2-6 to give the tricarbonyl(dihydrovitamin K)chromium complexes 7-11. Oxidation of 7-11 with silver(I) oxide leads to the vitamins of the K1 and K2 series 17-21, whereas the 5-10-η6-isomers 12-16 yield the tricarbonyl(vitamin K)chromium complexes 22-26. The syntheses proceed stereospecifically with respect to the isoprenoid side chain.
    Notes: Pentacarbonyl(methoxyphenylcarben)chrom(0) (1) reagiert mit den isoprenoiden Eninen 2-6 zu den Tricarbonyl(dihydrovitamin K)chrom(0)-Komplexen 7-11. Deren Oxidation mit Silber(I)-oxid liefert die Vitamine der K1- und K2-Reihe 17-21, während die 5-10-η6-Isomeren 12-16 zu den Tricarbonyl(vitamin K)chrom(0)-Komplexen 22-26 oxidiert werden. Die Synthesen verlaufen bezüglich der isoprenoiden Seitenketten stereospezifisch.
    Additional Material: 4 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19821150404
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...