01552nas a2200205   4500008004100000022001400041245010000055210006900155260007300224300001200297490000800309520076700317653002301084653001701107653001801124653002401142100002801166700002901194856012301223       2008                        eng d  a0920-586100aPdCl2(bipy) complex - an efficient catalyst for Heck reaction in glycol-organic biphasic medium0 aPdCl2bipy complex an efficient catalyst for Heck reaction in gly  aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcFEB  a353-3590 v1313 a<p>The Palladium complex PdCl2(bipy) (1) was found to be efficient in catalyzing the Heck reaction of aryl halides in a biphasic system comprising ethylene glycol along with an organic solvent. A proper tailoring of the organic phase ensured that the leaching of the catalyst to the organic phase was negligible. The catalyst was active for the Heck reaction of a number of olefins, aryl halides, in presence of organic and inorganic bases. The PdCl2(bipy) catalyst was stable and could be recycled for five times without any loss in activity and selectivity. A major advantage of this work is that unlike hitherto reported biphasic systems; it does not employ a water-soluble ligand to achieve biphasic catalysis. (c) 2007 Elsevier B.V. All rights reserved.</p>10aBiphasic catalysis10aC-C coupling10aHeck reaction10aPdCl2(bipy) complex1 aJagtap, Sangeeta, Vijay1 aDeshpande, Raj, Madhukar  uhttps://library.ncl.res.in/content/pdcl2bipy-complex-efficient-catalyst-heck-reaction-glycol-organic-biphasic-medium-001806nas a2200205   4500008004100000022001400041245007700055210006900132260007400201300001200275490000800287520106600295653002301361653001801384653001301402653002401415100002801439700002901467856010401496       2012                        eng d  a1878-519000aKinetics of the Heck reaction in biphasic organic-ethylene glycol medium0 aKinetics of the Heck reaction in biphasic organicethylene glycol  aVAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDSbSPRINGERcAUG  a457-4730 v1063 a<p>PdCl2(bipy) was found to be an efficient and stable catalyst in biphasic medium (organic-glycol) for the Heck reaction. The kinetics of the Heck coupling of styrene with iodobenzene using the same catalyst was studied in a biphasic medium in a temperature range of 393-413 K. The rate was found to have a first order dependence tending to a fractional order, on the iodobenzene as well as catalyst concentration. The rate was found to have a complex dependence on the styrene concentration and passes through a maximum, showing typical substrate inhibition kinetics. The rate had a first order dependence on the base (morpholine) concentration. The trends observed for the influence of the different parameters on the activity of the catalyst are in agreement with the established mechanism for Heck reaction. An empirical rate model has been proposed to fit the observed rate data. The activation energy was found to be 72.91 kJ/mol. This is the first time that kinetic modeling of Heck reaction in a biphasic medium (organic-glycol) has been attempted.</p>10aBiphasic catalysis10aHeck reaction10akinetics10aPdCl2(bipy) complex1 aJagtap, Sangeeta, Vijay1 aDeshpande, Raj, Madhukar  uhttps://library.ncl.res.in/content/kinetics-heck-reaction-biphasic-organic-ethylene-glycol-medium-001610nas a2200205   4500008004100000022001400041245012600055210006900181260010700250300001400357490000700371520077400378653002301152653001801175653001701193653001501210100002801225700002201253856012901275       2013                        eng d  a0970-707700aCinnamic acid derivatives via heck reaction in an aqueous-biphasic catalytic system with easy catalyst-product separation0 aCinnamic acid derivatives via heck reaction in an aqueousbiphasi  a11/100 RAJENDRA NAGAR, SECTOR 3,, SAHIBABAD 201 005, GHAZIABAD, INDIAbASIAN JOURNAL OF CHEMISTRYcNOV  a8633-86370 v253 a<p>A true biphasic [aqueous-organic] system for the coupling of water soluble sodium acrylate with different aryl halides for the synthesis of cinnamic acid derivatives has been developed, employing palladium catalysts that is soluble in organic phase. Amongst them, palladacycle was found to be stable in presence of water and could be recycled for four times with no loss in the activity. Such a system facilitates easy recycle of catalyst and also the removal of the salts from the catalyst phase, ensuring high activity with respect to cumulative turn over number (TON) and turn over frequency (TOF). The reaction was facilitated by organic as well as inorganic bases. The efficiency of the catalyst, role of organic/inorganic bases on the activity is reported.</p>10aBiphasic catalysis10aHeck reaction10aPalladacycle10aSeparation1 aJagtap, Sangeeta, Vijay1 aDeshpande, R., M.  uhttps://library.ncl.res.in/content/cinnamic-acid-derivatives-heck-reaction-aqueous-biphasic-catalytic-system-easy-catalyst-001471nas a2200157   4500008004100000022001400041245012900055210006900184260008800253300001200341490000700353520077600360100002801136700002201164856012701186       2013                        eng d  a0023-158400aInsight into PdCl2(bipy) complex as an efficient catalyst for heck reaction and kinetic investigations in homogeneous medium0 aInsight into PdCl2bipy complex as an efficient catalyst for heck  a233 SPRING ST, NEW YORK, NY 10013-1578 USAbMAIK NAUKA/INTERPERIODICA/SPRINGERcMAY  a314-3210 v543 a<p>PdCl2(bipy) complex (bipy = 2,2'-bipyrydine) efficiently catalyzes the vinylation of aryl halides. The activity of this catalyst for the Heck reactionwas demonstrated for a variety of aryl halides and olefins in the presence of different organic and inorganic bases. The catalyst is stable under the reaction conditions and no degradation was observed. The kinetics of the Heck coupling of styrene with iodobenzene using the PdCl2(bipy) complex with potassium acetate as a base was studied over a temperature range of 393-413 K in 2-nitro-2-methyl-1-propanol medium. An empirical rate model has been proposed to fit the observed data and is found to be in good agreement with experimental results. The activation energy of the reactionwas found to be 98.70 kJ/mol.</p>1 aJagtap, Sangeeta, Vijay1 aDeshpande, R., M.  uhttps://library.ncl.res.in/content/insight-pdcl2bipy-complex-efficient-catalyst-heck-reaction-and-kinetic-investigations-001568nas a2200205   4500008004100000022001400041245009200055210006900147260010600216300001400322490000700336520074300343653003101086653001701117653001801134653002701152100002801179700002901207856012601236       2013                        eng d  a0040-403900aTrue water soluble palladium-catalyzed Heck reactions in aqueous-organic biphasic media0 aTrue water soluble palladiumcatalyzed Heck reactions in aqueouso  aTHE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLANDbPERGAMON-ELSEVIER SCIENCE LTDcMAY  a2733-27360 v543 a<p>A stable water soluble palladium catalyst has been demonstrated for the Heck reaction in a biphasic medium (water-non-polar organic solvent). Biphasic Heck reactions reported till now generally employ a non-polar solvent along with an aqueous polar water miscible organic solvent as the second phase. The efficiency of the Pd complex of TOTPS [Trisodium salt of tri-(ortho-tolyl) phosphine tri sulfonate] for the vinylation of different aryl iodides and olefins is demonstrated. The advantages of a co-solvent for this biphasic system have also been shown. The catalyst has been recycled efficiently retaining the activity with negligible loss of catalyst and without leaching of the Pd. (c) 2013 Elsevier Ltd. All rights reserved.</p>10aAqueous biphasic catalysis10aC-C coupling10aHeck reaction10aWater-soluble catalyst1 aJagtap, Sangeeta, Vijay1 aDeshpande, Raj, Madhukar  uhttps://library.ncl.res.in/content/true-water-soluble-palladium-catalyzed-heck-reactions-aqueous-organic-biphasic-media-0