13343-79-8Relevant academic research and scientific papers
Kinetics and Mechanistic Insights into the Acetate-Assisted Dimerization of Terminal Alkynes under Ruthenium- and Acid-Promoted (RAP) Catalysis
Salvio, Riccardo,Juliá-Hernández, Francisco,Pisciottani, Luca,Mendoza-Mero?o, Rafael,García-Granda, Santiago,Bassetti, Mauro
, p. 3830 - 3840 (2017)
The mechanism of the dimerization of terminal aryl alkynes promoted by [{RuCl(μ-Cl)(η6-p-cymene)}2](1)/AcOH, under cooperative transition metal/Br?nsted acid catalysis, has been investigated with regard to (i) the activation of the d
Pseudo-tetrahedral Rhodium and Iridium Complexes: Catalytic Synthesis of E-Enynes
Geer, Ana M.,Julián, Alejandro,López, José A.,Ciriano, Miguel A.,Tejel, Cristina
, p. 17545 - 17556 (2018)
The reactions of the rhodium(I) and iridium(I) complexes [M(PhBP3)(C2H4)(NCMe)] (PhBP3=PhB(CH2PPh2)3?) with alkynes have resulted in the synthesis of a new family of p
A facile regio- and stereocontrolled synthesis of (Z)-1,3- enylnylstannanes via cross coupling of (E)-α-iodovinylstannanes with terminal alkynes
Huang, Xian,Zhong, Ping
, p. 3425 - 3434 (1999)
Conjugated enynes bearing a stannyl group were conveniently obtained under mild condition via the cross coupling of the corresponding (E)-α- iodovinylstannanes with terminal alkynes in the presence of Pd(PPh3)4 and CuBr.
Novel and general cross-coupling reactions of alkynylzinc reagents and organotellurium compounds
Dabdoub, Miguel J.,Dabdoub, Vania B.,Marino, Joseph P.
, p. 437 - 440 (2000)
The efficient cross-coupling reactions of different alkynyl organozinc reagents with unsaturated organotellurium species catalyzed by Pd(PPh3)4/CuI and using THF/DMF systems are described. These cross-coupling reactions are general and permit the formation of new sp-sp2 carbon-carbon bonds. New reactions to reach the necessary alkynylzinc intermediates were also developed from terminal alkynes or using acetylenic tellurides as starting materials.
Solvent-free hydrosilylation of terminal alkynes by reaction with a nonclassical ruthenium hydride pincer complex
Conifer, Christopher,Gunanathan, Chidambaram,Rinesch, Torsten,H?lscher, Markus,Leitner, Walter
, p. 333 - 339 (2015)
Upon the simple addition of substrates, the ruthenium pincer complex [Ru(tBuPNP)(H2)(H)2] [1; tBuPNP = 2,6-bis(di-tert-butylphosphinomethyl) pyridine] is an active and selective catalyst system for the hydrosilylation of terminal alkyl alkynes under mild, solvent-free conditions. The reactivity of this system for other functionalized terminal alkynes was also investigated, and we observed competing catalytic cycles that produce both alkyne dimers and dehydrogenative silylation products. Kinetic measurements for the hydrosilylation of 1-octyne show that the catalyst has an initial turnover frequency of 121 h-1 at room temperature. The stoichiometric reaction between 1 and H2SiPh2 yields [Ru(tBuPNP)(H)2(H2SiPh2)], which undergoes Si-H bond activation to yield the catalytically active species [Ru(tBuPNP)-(HSiPh2)(H)]. The reaction of 1 with phenylacetylene yielded [Ru(tBuPNP)(H)2(HC≡CPh)] and [Ru(tBuPNP)(H)(C≡CPh)-(HC≡CPh)], and we propose that the latter is the active species in the dimerization reaction.
Influence of the gegenion in the transmetalation reaction of vinylic tellurides with higher order cyanocuprates
Chieffi, Andre,Comasseto, Joao V.
, p. 4063 - 4066 (1994)
Dilithium cyanocuprates R2LCu(CN)Li2 (L=2-Th, Me) react with vinylic tellurides of Z configuration, RCH=CHTeR1 to give higher order vinylic cyanocuprates, [(RCH=CH)LCu(CN)Li2]. By changing the gegenion from lithium to magnesium [R2LCu(CN)LiMgBr or R2LCu(CN)(MgBr)2] the reaction gives cross - coupling products of Z configuration, RCH=CHR2 in good yields.
Freedom: A copper-free, oxidant-free and solvent-free palladium catalysed homocoupling reaction
Chen, Longrui,Lemma, Betsegaw E.,Rich, Jenna S.,Mack, James
, p. 1101 - 1103 (2014)
Herein, we describe a copper-free, oxidant-free, solvent-free homocoupling reaction using a palladium catalyst under mechanochemical conditions. We extended the methodology to palladium catalyst on solid support which showed a different reactivity and different product ratios from the non-supported catalyst. We were able to recycle the polymer supported catalyst for 5 cycles.
An unprecedented iridium(III) catalyst for stereoselective dimerisation of terminal alkynes
Ciclosi, Marco,Estevan, Francisco,Lahuerta, Pascual,Passarelli, Vincenzo,Perez-Prieto, Julia,Sanau, Mercedes
, p. 234 - 236 (2008)
A novel iridium(III) hydride complex, IrHCl(TIMP3) (HTIMP 3, = tris[1 -(diphenylphosphino)-3-methyl-1 H-indol-2-yl]methane) was prepared and fully characterized in both the solid state and in solution. Chloride abstraction by silver
Pseudotetrahedral rhodium(I) complexes
Geer, Ana M.,Julian, Alejandro,Lopez, Jose A.,Ciriano, Miguel A.,Tejel, Cristina
, p. 2732 - 2736 (2014)
A combination of four-electron donors, such as alkynes, with strongly donating and strong-field scorpionate ligands is appropriate to create pseudotetrahedral rhodium(I) environments, as found in [Rh(PhBP 3)(HCi£CPh)], which promotes Hi-C bond
Terminal Alkyne Coupling Reactions through a Ring: Mechanistic Insights and Regiochemical Switching
Storey, Caroline M.,Gyton, Matthew R.,Andrew, Rhiann E.,Chaplin, Adrian B.
, p. 12003 - 12006 (2018)
The mechanism and selectivity of terminal alkyne coupling reactions promoted by rhodium(I) complexes of NHC-based CNC pincer ligands have been investigated. Synthetic and kinetic experiments support E- and gem-enyne formation through a common reaction seq
