53881-33-7Relevant academic research and scientific papers
Reactions of cyclopalladated complexes with HPPh2resulting in ligand phosphination
Kukowski, Jonathan E.,Stepanova, Valeria A.,Smoliakova, Irina P.
supporting information, p. 155 - 166 (2016/12/30)
Reactions of a dinuclear chloro-bridged cyclopalladated complex (CPC) derived from N,N-dimethylbenzylamine with HPPh2under a variety of conditions resulted in the phosphination of the cyclopalladated ligand. The best yield (77%) of the reaction product, ortho-(diphenylphosphino)-N,N-dimethylbenzylamine, was achieved using 4.5 equiv. of HPPh2in toluene in the presence of Cs2CO3at 40?°C. The scope of the reaction was explored with a range of enantiopure and achiral C,N, C,S and C,P CPCs having either five- or six-membered rings and containing either an sp2or sp3C[sbnd]Pd bond. The corresponding N,P, S,P, and P,P ligands or their oxides were isolated in 30–70% yields. Reactions of HPPh2in toluene with CPCs derived from D-camphor methyloxime and 2-tert-butyl-4,4-dimethyl-2-oxazoline provided unique mononuclear Pd(II) complexes with a terminal PPh2ligand in 16 and 52% yield, respectively. Structures of all new compounds were supported by1H,13C{1H}, DEPT,31P{1H}, and 2D NMR spectra.
Ortho-Trialkylstannyl Arylphosphanes by C-P and C-Sn Bond Formation in Arynes
Li, Yuanming,Chakrabarty, Shyamal,Mück-Lichtenfeld, Christian,Studer, Armido
, p. 802 - 806 (2016/02/27)
A novel and efficient approach to ortho-trialkylstannyl arylphosphanes by the reaction of arynes generated in situ with stannylated phosphanes (R3Sn-PR2) is described. Concurrent C-P and C-Sn bond formation occurs with high yields, and stannylated products are easily transformed into valuable ortho-substituted arylphosphanes. The reaction features high efficiency, good regioselectivity, and excellent practicality.
Chemoselectivity control in the reaction of a dinuclear chloro-bridged cyclopalladated complex with potassium diphenylphosphide
Stepanova, Valeria A.,Dunina, Valery V.,Smoliakova, Irina P.
, p. 871 - 878 (2011/03/21)
Reactions of KPPh2 with the dimeric cyclopalladated complex {Pd(N∩C)(μ-Cl)}2 1 derived from N,N-dimethylbenzylamine were studied using different reagent ratios, temperature, reaction time, concentrations and solvents. Complex 3, the μ-Cl-μ-PPh2 analog of 1, was obtained in 76% yield in the one-hour reaction using the 1:1 ratio of dimer 1 and KPPh2 in THF at rt. ortho-(Diphenylphosphino)benzylamine 4 was synthesized in 58% yield by reacting complex 1 with 4.5 equiv. of KPPh2 in THF at rt. A possible mechanism of the aminophosphine formation is proposed on the basis of the experimental data including 31P{1H} NMR spectra of reaction mixtures.
Triaryl phosphine-functionalized N-heterocyclic carbene ligands for Heck reaction
Wang, Ai-E,Xie, Jian-Hua,Wang, Li-Xin,Zhou, Qi-Lin
, p. 259 - 266 (2007/10/03)
A new type of triaryl phosphine-functionalized imidazolium salts 6 were prepared. Their palladium complexes, generated in situ, were successfully applied in the palladium-catalyzed Heck reaction. Using 1 mol% of Pd(dba) 2 and 1 mol% 6c in the presence of 2 equiv of K2CO 3 in DMAc has proven to be highly efficient for the coupling of a wide array of aryl bromides and iodides with acrylates in excellent yield. The coupling of 4-bromotoluene with various styrene derivatives catalyzed by Pd/6c complex also gave good results. Graphical Abstract.
Process for the preparation of a butene
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, (2008/06/13)
Process for the preparation of 1-butene by dimerization of ethylene in the presence of an aprotic solvent and a catalytic system prepared by combining (a) a Pd compound, (b) an anion of an acid having a pKa = 1 N atoms which atoms bear no H atoms and in which compound each N atom is connected to the P atom by an organic bridging group containing >= 1 C atom in the bridge.
