Clusters containing carbene ligands. 11. Carbene ligand transfer. Reaction of osmium cluster Os3(CO)11[C(Et)NMe2] with terminal alkynes [Erratum to document cited in CA115(15):159381q]

1992 ◽  
Vol 11 (1) ◽  
pp. 496-496
Author(s):  
Richard D. Adams ◽  
Gong Chen
Keyword(s):  
Transfer Reaction ◽  
Terminal Alkynes ◽  
Carbene Ligands ◽  
Ligand Transfer

scholarly journals Cyclic(Alkyl)(Amino)Carbene Ligands Enable Cu-Catalyzed Markovnikov Protoboration and Protosilylation of Terminal Alkynes: A Versatile Portal to Functionalized Alkenes

2021 ◽  
Author(s):  
Yang Gao ◽  
Sima Yazdani ◽  
Aaron Kendrick ◽  
Glen Junor ◽  
Douglas Grotjahn ◽  
...  
Keyword(s):  
High Selectivity ◽  
Building Blocks ◽  
Terminal Alkynes ◽  
Carbene Ligands ◽  
Catalytic Systems ◽  
General Solutions ◽  
Shed Light ◽  
Limited Scope

Regioselective hydrofunctionalization of alkynes represents a straightforward route to access alkenyl boronate and silane building blocks. In previously reported catalytic systems, high selectivity is achieved with a limited scope of substrates and/or reagents, with general solutions lacking. Herein, we describe a selective copper-catalyzed Markovnikov hydrofunctionalization of terminal alkynes that is facilitated by strongly donating cyclic (alkyl)(amino)carbene (CAAC) ligands. Using this method, both alkyl- and aryl-substituted alkynes are coupled with a variety of boryl and silyl reagents with high α-selectivity. The reaction is scalable, and the products are versatile intermediates that can participate in various downstream transformations. Preliminary mechanistic experiments shed light on the role of CAAC ligands in this process.

Platinum Complexes Bearing Bulky N-Heterocyclic Carbene Ligands as Efficient Catalysts for the Fully Selective Dimerization of Terminal Alkynes

ChemCatChem ◽  
2017 ◽  
Vol 9 (19) ◽  
pp. 3627-3631 ◽  
Author(s):  
Patrycja Żak ◽  
Małgorzata Bołt ◽  
Jan Lorkowski ◽  
Maciej Kubicki ◽  
Cezary Pietraszuk
Keyword(s):  
Platinum Complexes ◽  
Terminal Alkynes ◽  
Carbene Ligands

REACTIONS OF PALLADIUM COMPOUNDS WITH ACETYLENES: II. TETRAKIS(p-CHLOROPHENYL)CYCLOBUTADIENE PALLADIUM COMPLEXES

1965 ◽  
Vol 43 (2) ◽  
pp. 470-478 ◽  
Author(s):  
P. M. Maitlis ◽  
D. Pollock ◽  
M. L. Games ◽  
W. J. Pryde
Keyword(s):  
Transfer Reaction ◽  
Methylene Chloride ◽  
Hydrogen Bromide ◽  
Palladium Complexes ◽  
Palladium Chloride ◽  
Palladium Compounds ◽  
New Type ◽  
Iron Tricarbonyl ◽  
Ligand Transfer

It is found that both diphenylacetylene and bis(p-chlorophenyl)acetylene on reaction with bis(benzonitrile)palladium chloride in benzene give the benzenoid trimer (R6C6) as well as a new type of cyclobutadiene complex [(R4C4)(PdCl2)x]2(R = Ph and p-ClC6H4) for which structure IV is proposed. p,p′-Dichlorotolan reacts with bis(benzonitrile)palladium chloride in ethanol – methylene chloride to give a complex [(R4C4OC2H5)PdCl]2 (II) which is converted into the normal cyclobutadiene complex [(R4C4)PdBr2]2 (V) on treatment with hydrogen bromide. This can also be obtained from IV. The tetrakis(p-chlorophenyl)cyclobutadiene palladium halides on treatment with tri-n-butylphosphine give a dimer of tetrakis(p-chloro-phenyl)cyclobutadiene which is probably octakis(p-chlorophenyl)cyclooctatetraene. Tetrakis-(p-chlorophenyl)cyclobutadiene iron tricarbonyl has also been prepared from IV and V by a ligand-transfer reaction.

Cyclobutadiene–metal complexes. XI. Tetramethylcyclobutadienecobalt(I) complexes

1967 ◽  
Vol 45 (18) ◽  
pp. 2017-2021 ◽  
Author(s):  
R. Bruce ◽  
P. M. Maitlis
Keyword(s):  
Metal Complexes ◽  
Low Temperatures ◽  
Transfer Reaction ◽  
Quantitative Yield ◽  
Dicobalt Octacarbonyl ◽  
Nickel Tetracarbonyl ◽  
Ligand Transfer

The ligand-transfer reaction of tetramethylcyclobutadienenickel chloride dimer with dicobalt octacarbonyl gave tetramethylcyclobutadienedicobalt hexacarbonyl [Me4C4Co(CO)2Co(CO)4] and nickel tetracarbonyl. Triphenylphosphine replaced one carbonyl in Me4C4Co(CO)2·Co(CO)4 to give Me4C4Co(CO)2·Co(CO)3PPh3. Both Me4C4Co(CO)2·Co(CO)4 and Me4C4Co(CO)2·Co(CO)3PPh3 underwent cleavage with iodine at low temperatures to give tetramethylcyclobutadienecobalt dicarbonyl iodide (Me4C4Co(CO)2I); this was also obtained in quantitative yield from [Me4C4NiI2]2 and Co2(CO)8. One carbonyl in Me4C4Co(CO)2I was replaced on reaction with triphenylphosphine, giving Me4C4Co(CO)(PPh3)I. Me4C4Co(Co)2I reacted with both sodium cyclopentadienide and [C5H5Fe(CO)2]2 to give (π-cyclopentadienyl)-(π-tetramethylcyclobutadiene) cobalt.

Photochemical azido ligand transfer reaction of a triarylbismuth diazide with alkynes

1993 ◽  
Vol 34 (6) ◽  
pp. 1055-1056 ◽  
Author(s):  
Hitomi Suzuki ◽  
Chie Nakaya ◽  
Yoshihiro Matano
Keyword(s):  
Transfer Reaction ◽  
Ligand Transfer
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