01653nas a2200217   4500008004100000022001400041245014800055210006900203260009500272300001200367490000800379520076600387653002401153653002501177653001301202653001501215653003101230100002001261700002801281856012601309       2008                        eng d  a0021-951700aStudies in structural characterization and correlation with the catalytic activity of an efficient and stable WOx/SBA-15 nanocomposite catalyst0 aStudies in structural characterization and correlation with the   a525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USAbACADEMIC PRESS INC ELSEVIER SCIENCEcJUL  a283-2900 v2573 a<p>A new WOx/SBA-15 nanocomposite catalyst system was developed by hydrothermal synthesis. The material was characterized by X-ray diffraction, high-resolution transmission electron microscopy, sorption analysis, FT-IR, CP-MAS NMR, XPS, and energy-dispersive X-ray analysis. Various types of aromatic and aliphatic sulfides were selectively oxidized to sulfoxides in good to excellent yields without becoming overoxidized to the sulfones using 70% aq. tert-butyl hydrogen peroxide in the presence of nanocomposite catalyst at room temperature. The catalyst could be easily recovered and reused for at least eight reaction cycles under the reaction conditions described here with no significant loss of reactivity. (c) 2008 Elsevier Inc. All rights reserved.</p>10acatalytic oxidation10amesoporous materials10aSulfides10aSulfoxides10atungsten oxide nanocluster1 aBordoloi, Ankur1 aHalligudi, Shivaraj, B.  uhttps://library.ncl.res.in/content/studies-structural-characterization-and-correlation-catalytic-activity-efficient-and-001662nas a2200265   4500008004100000022001400041245015200055210006900207260009500276300001200371490000800383520066000391653002301051653002201074653002201096653001301118653001501131653002701146653001301173100001701186700001901203700001701222700002801239856012901267       2009                        eng d  a0021-951700aSynthesis of chiral sulfoxides by enantioselective sulfide oxidation and subsequent oxidative kinetic resolution using immobilized Ti-binol complex0 aSynthesis of chiral sulfoxides by enantioselective sulfide oxida  a525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USAbACADEMIC PRESS INC ELSEVIER SCIENCEcFEB  a111-1180 v2623 a<p>Chiral Ti-binol complex was immobilized onto ionic liquid modified SBA-15 and characterized by different physicochemical techniques. The catalyst was found to be highly enantioselective in the heterogeneous asymmetric oxidation of prochiral sulfides to sulfoxides and subsequent oxidative kinetic resolution of the sulfoxides using aqueous tert-butylhydroperoxide as the oxidant. A positive non-linear effect was observed in the oxidation-kinetic resolution of thioanisole using this supported catalyst. The supported catalyst was reused in multiple catalytic runs without any loss of enantioselectivity. (C) 2008 Elsevier Inc. All rights reserved.</p>10aKinetic resolution10aMesoporous silica10aNon-linear effect10aSulfides10aSulfoxides10aSupported ionic liquid10aTi-binol1 aSahoo, Suman1 aKumar, Pradeep1 aLefebvre, F.1 aHalligudi, Shivaraj, B.  uhttps://library.ncl.res.in/content/synthesis-chiral-sulfoxides-enantioselective-sulfide-oxidation-and-subsequent-oxidative-001525nas a2200265   4500008004100000022001400041245014100055210006900196260000800265300001400273490000700287520065100294653001700945653002000962653001400982653001000996653001301006653001501019100002001034700001701054700001601071700001801087700002301105856013101128       2017                        eng d  a0922-616800aCatalyst-free oxidation of sulfides to sulfoxides and diethylamine catalyzed oxidation of sulfides to sulfones using oxone as an oxidant0 aCatalystfree oxidation of sulfides to sulfoxides and diethylamin  cDEC  a6875-68880 v433 a<p>We describe here our journey from the failure of our attempts in controlled oxidation of sulfides to sulfoxides using an Oxone(A (R))-KBr combination to our success in the development of a catalyst-free protocol for the oxidation of sulfides to sulfoxides using Oxone as an oxidant. We also describe the failure of our attempts at the oxidation of sulfides to sulfones using an excess of Oxone-KBr as well as Oxone, and our success towards the development of a rapid, scalable and chromatography-free protocol for the oxidation of sulfides to sulfones using diethylamine-Oxone as an unprecedented catalyst-oxidant combination. [GRAPHICS] .</p>10adiethylamine10aorganocatalysis10aOxidation10aOxone10aSulfones10aSulfoxides1 aKupwade, R., V.1 aKhot, S., S.1 aLad, U., P.1 aDesai, U., V.1 aWadgaonkar, P., P.  uhttps://library.ncl.res.in/content/catalyst-free-oxidation-sulfides-sulfoxides-and-diethylamine-catalyzed-oxidation-sulfides-001505nas a2200253   4500008004100000245015300041210006900194260000800263300001600271490000700287520064100294653001700935653002000952653001400972653001000986653001300996653001501009100002001024700001701044700001601061700001801077700002801095856012801123       2018                        eng d00aErratum to: catalyst-free oxidation of sulfides to sulfoxides and diethylamine catalyzed oxidation of sulfides to sulfones using oxone as an oxidant0 aErratum to catalystfree oxidation of sulfides to sulfoxides and   cFEB  a1437–14370 v443 a<p>We describe here our journey from the failure of our attempts in controlled oxidation of sulfides to sulfoxides using an Oxone®–KBr combination to our success in the development of a catalyst-free protocol for the oxidation of sulfides to sulfoxides using Oxone as an oxidant. We also describe the failure of our attempts at the oxidation of sulfides to sulfones using an excess of Oxone–KBr as well as Oxone, and our success towards the development of a rapid, scalable and chromatography-free protocol for the oxidation of sulfides to sulfones using diethylamine–Oxone as an unprecedented catalyst–oxidant combination.</p>10adiethylamine10aorganocatalysis10aOxidation10aOxone10aSulfones10aSulfoxides1 aKupwade, R., V.1 aKhot, S., S.1 aLad, U., P.1 aDesai, U., V.1 aWadgaonkar, Prakash, P.  uhttps://library.ncl.res.in/content/erratum-catalyst-free-oxidation-sulfides-sulfoxides-and-diethylamine-catalyzed-oxidation