01037nas a2200205   4500008004100000022001400041245011800055210006900173260007500242300001400317520023700331653002200568653001200590653002100602653002000623100002400643700001700667700001800684856012900702       2005                        eng d  a0936-521400aFacile regioselective decomposition of tosylhydrazones: an application towards the synthesis of alpha-lipoic acid0 aFacile regioselective decomposition of tosylhydrazones an applic  aRUDIGERSTR 14, D-70469 STUTTGART, GERMANYbGEORG THIEME VERLAG KGcMAY  a1129-11323 a<p>A facile regioselective decomposition of tosylhydrazones using NaOH as a base in refluxing isopropyl alcohol is described. This finding has been Successfully applied towards the synthesis of (&amp;PLUSMN;)-α-lipoic acid (1).</p>10aalpha-lipoic acid10aOlefins10aRegioselectivity10atosylhydrazones1 aChavan, Subhash, P.1 aKale, R., R.1 aPasupathy, K.  uhttps://library.ncl.res.in/content/facile-regioselective-decomposition-tosylhydrazones-application-towards-synthesis-alpha-001198nas a2200229   4500008004100000022001400041245008600055210006900141260005700210300001200267490000800279520041000287653001900697653002100716653002100737653001200758653001200770100001800782700002200800700002900822856011700851       2006                        eng d  a1011-372X00aHydroformylation of olefins using dispersed molecular catalysts on solid supports0 aHydroformylation of olefins using dispersed molecular catalysts   a233 SPRING ST, NEW YORK, NY 10013 USAbSPRINGERcAUG  a129-1330 v1103 a<p>A new method for heterogenization of metal complex catalysts by precipitation of its water-soluble analogue as a Gr.2 metals (Ca, Sr or Ba) salt on porous supports has been proposed. This technique yields a highly dispersed catalyst having a significantly higher activity (TOF) for hydroformylation of olefins compared to other known heterogenized catalysts. The catalyst can be recycled with ease.</p>10acarbon support10aHeterogenization10aHydroformylation10aOlefins10aRhodium1 aPagar, N., S.1 aDeshpande, R., M.1 aChaudhari, Raghunath, V.  uhttps://library.ncl.res.in/content/hydroformylation-olefins-using-dispersed-molecular-catalysts-solid-supports-002325nas a2200241   4500008004100000022001400041245010100055210006900156260006900225300001000294490000800304520143300312653001201745653003401757653002301791653003901814653001201853653002201865100001801887700002501905700002401930856012901954       2014                        eng d  a0010-854500aContemporary avenues in catalytic P-H bond addition reaction: a case study of hydrophosphination0 aContemporary avenues in catalytic PH bond addition reaction a ca  aPO BOX 564, 1001 LAUSANNE, SWITZERLANDbELSEVIER SCIENCE SAcAPR  a52-730 v2653 a<p>Remarkable advances and current state-of-the-art developments in catalytic hydrophosphination of alkenes and alkynes are reviewed. The challenges in constructing a C P bond with a special emphasis on metal catalysed (asymmetric) hydrophosphination are highlighted. Only those systems that unambiguously proceed via P H bond addition across a C-C/X (X = O, N, S) multiple bond have been covered in this overview. Reviewed examples support the assumption that either strongly chelating ligands or reaction products that act as ligands, enhance the rate of hydrophosphination. The asymmetric variant of this transformation allows installation of p-chiral [enantiomeric excess (ee) up to 82%] as well as C-chiral (ee up to 99%) centres. The limited spectroscopic, mechanistic data and OFT calculations point at two distinctly different mechanisms. In case of hydrophosphination, the metal undergoes oxidative addition and reductive elimination steps (in general), thus changing the oxidation state from M(0) to M(II) and back to M(0). Whereas in asymmetric hydrophosphination it is proposed that the oxidation state of the metal remains unaltered throughout the catalytic cycle. The examples described in this overview showcase the real power of catalytic hydrophosphination in constructing various phosphorus compounds, which may initiate a new era in organo-phosphorus chemistry. (C) 2014 Elsevier B.V. All rights reserved.</p>10aAlkynes10aAsymmetric hydrophosphination10aHydrophosphination10aMetal catalyzed hydrophosphination10aOlefins10aP-H bond addition1 aKoshti, Vijay1 aGaikwad, Shahaji, R.1 aChikkali, Samir, H.  uhttps://library.ncl.res.in/content/contemporary-avenues-catalytic-p-h-bond-addition-reaction-case-study-hydrophosphination-002037nas a2200289   4500008004100000022001400041245013000055210006900185260000800254300001400262490000700276520106100283653002601344653003101370653001201401653001401413653001701427100002501444700001701469700002401486700002101510700002701531700002401558700002101582700002401603856012001627       2020                        eng d  a2192-650600aPalladium-catalyzed insertion of ethylene and 1,1-disubstituted difunctional olefins: an experimental and computational study0 aPalladiumcatalyzed insertion of ethylene and 11disubstituted dif  cJUN  a1200-12090 v853 a<p>Insertion or coordination copolymerization of ethylene with di-substituted olefins is challenging and the choice of di-substituted mono-functional olefin versus di-substituted di-functional olefin (DDO) appears to be decisive. Here we show that DDO-inserted species are amenable to ethylene insertion and polymerization. DDOs such as 2-acetamidoacrylic acid (AAA), methyl 2-acetamidoacrylate (MAAA), and ethyl 2-cyanoacrylate (ECA) were treated with palladium complex [{P perpendicular to O}PdMe(L)] (P perpendicular to O=kappa(2)-P,O-Ar2PC6H4SO2O with Ar=2-MeOC6H4; L=C2H6OS) and the existence of respective insertion intermediates in moderate yield (up to 37 %) was established. These intermediates were exposed to ethylene and corresponding ethylene-inserted products were isolated and characterized. A careful comparison with three model compounds confirmed ethylene insertion and polymerization. Thus, the combined experimental and computational investigations show that DDO-inserted species can undergo ethylene insertion and polymerization.</p>
10aHomogeneous catalysis10ainsertion copolymerization10aOlefins10aPalladium10aPolyethylene1 aGaikwad, Shahaji, R.1 aPatel, Ketan1 aDeshmukh, Satej, S.1 aMote, Nilesh, R.1 aBirajdar, Rajkumar, S.1 aPandole, Satish, P.1 aChugh, Jeetender1 aChikkali, Samir, H.  uhttps://library.ncl.res.in/content/palladium-catalyzed-insertion-ethylene-and-11-disubstituted-difunctional-olefins01819nas a2200217   4500008004100000022001400041245008100055210006900136260000800205520109100213653002601304653002101330653001801351653001201369653002301381100001901404700001701423700002701440700002401467856011001491       2021                        eng d  a1527-899900aPhosphorus ligands in hydroformylation and hydrogenation: a personal account0 aPhosphorus ligands in hydroformylation and hydrogenation a perso  cMAR3 a<p>Metal-catalyzed hydroformylation and hydrogenation heavily rely on ligands, among which phosphorous ligands play a pivotal role. This personal account presents a selection of three distinct classes of phosphorous ligands, namely, monodentate meta-substituted phosphinites, bis-phosphites, and P-chiral supramolecular phosphines, developed in our group. The synthesis of these ligands, isolation, characterization, and their performance in transition metal-catalyzed hydroformylation, isomerizing hydroformylation, and asymmetric hydrogenation of olefins is summarized. The state of the art development in iron-catalyzed hydroformylation of alkenes and our contributions to the field is discussed. Use of phosphines enabled iron-catalyzed hydroformylation of alkenes under mild conditions. Thus, this account demonstrates the central role of phosphorus ligands in industrially relevant transformations such as hydrogenation and hydroformylation. The seemingly matured field of ligand discovery still holds significant potential and will steer the field of homogeneous catalysis.</p>
10aHomogeneous catalysis10aHydroformylation10aHydrogenation10aOlefins10aPhosphorus ligands1 aTewari, Tanuja1 aKumar, Rohit1 aChandanshive, Amol, C.1 aChikkali, Samir, H.  uhttps://library.ncl.res.in/content/phosphorus-ligands-hydroformylation-and-hydrogenation-personal-account