ChemInform Abstract: CUMULATED DOUBLE BOND SYSTEMS AS LIGANDS. VI. CARBONYL COMPOUNDS OF CHROMIUM(0), MOLYBDENUM(0), AND TUNGSTEN(0) CONTAINING THIODIIMINE LIGANDS. MECHANISM OF THE FLUXIONAL PROCESS AND RESONANCE RAMAN RESULTS

1977 ◽  
Vol 8 (35) ◽  
pp. no-no
Author(s):  
R. MEIJ ◽  
T. A. M. KAANDORP ◽  
D. J. STUFKENS ◽  
K. VRIEZE
Keyword(s):  
Double Bond ◽  
Carbonyl Compounds ◽  
Resonance Raman ◽  
And Tungsten

Copper-Catalyzed Oxidative Self-Coupling of α-Amino Carbonyl Compounds for the Synthesis of Tetrasubstituted 1,4-Enediones

Synlett ◽  
2018 ◽  
Vol 29 (18) ◽  
pp. 2422-2426
Author(s):  
Bing Yi ◽  
Jiannan Xiang ◽  
Niannian Yi ◽  
Yi Xiong ◽  
Qingjun Huang ◽  
...  
Keyword(s):  
Double Bond ◽  
Carbonyl Compound ◽  
Carbonyl Compounds ◽  
Simultaneous Formation ◽  
High Stereoselectivity

A protocol for the copper-catalyzed oxidative self-coupling of α-amino carbonyl compounds has been developed for the synthesis of tetrasubstituted 1,4-enediones (Z-isomers) in moderate to good yields through the cleavage of four sp3C–H bonds and the simultaneous formation of one C=C double bond in the α-amino carbonyl compound. The strategy has the advantages of using readily available starting ­materials and of high stereoselectivity.

Zur Cycloaddition von Azidoameisensäuremethylester an die Metall-Carben-Doppelbindung in η2-Thiocarbenkomplexen des Molybdäns und Wolframs / Cycloaddition of Azidoformic Acid Methylester to the Metal Carbon Double Bond of η2-Thiocarbene Complexes of Molybdenum and Tungsten

1993 ◽  
Vol 48 (11) ◽  
pp. 1481-1487
Author(s):  
Fritz R. Kreißl ◽  
Wolfgang Schutt ◽  
Josef Ostermeier ◽  
Claudia M. Stegmair ◽  
Waltraud Ullrich ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Double Bond ◽  
Mass Spectra ◽  
Space Group ◽  
Carbon Double Bond ◽  
Bicyclic System ◽  
And Tungsten

Cationic η2-thiocarbene complexes of molybdenum and tungsten [Cp(CO)PMe3[BF4] (R = Me, Ph, Tol) add N3COOMe to the electron rich metal carbon double bond to yield the corresponding bicyclic system. The products have been characterized by 1H, 13C, 31P NMR, IR and mass spectra. The crystal structure of 4b has been determined: space group P21/n with a = 1749.9(7), b = 827.9(1), c = 1846.8(7) pm and Z = 4.

Reduction of conjugate double bonds with trichlorosilane

2000 ◽  
Vol 78 (11) ◽  
pp. 1396-1398 ◽  
Author(s):  
Moni Chauhan ◽  
Philip Boudjouk
Keyword(s):  
Double Bond ◽  
Carbonyl Compounds ◽  
Double Bonds ◽  
Cyclic Ketones ◽  
Unsaturated Esters ◽  
Mild Conditions ◽  
Carbon Double Bond

A variety of α,β-unsaturated esters and cyclic ketones underwent smooth reduction of the carbon–carbon double bond with a combination of inexpensive and readily available trichlorosilane and CoCl2. The reactions are performed under very mild conditions and products are obtained in high yields.Key words: reduction, carbonyl compounds, trichlorosilane, ketones, chemoselectivity.

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