02206nas a2200253 4500008004100000022001400041245012800055210006900183260000900252300001000261490000800271520131100279653002001590653002301610653002601633653003301659653002301692100002401715700002401739700002001763700002201783700002101805856012601826 2017 eng d a0926-860X00aEfficient oxidation of ethyl benzene using in situ generated molybdenum acetylide oxo-peroxo complex as recyclable catalyst0 aEfficient oxidation of ethyl benzene using in situ generated mol cFEB  a45-510 v5313 a

Selective oxidation of various alkanes/alkyl aromatics to corresponding carbonyl compounds has been carried out with very high conversion (similar to 98%) and selectivity (up to 100%) for carbonyl compounds using cyclopentadienyl molybdenum acetylide complex, CpMo(CO)(3)(C CPh) (1) as catalyst and tert-butyl hydrogen peroxide (TBHP) as an oxidant and turnover number (TON) of 88 was obtained with turnover frequency (TOF) of 2.45 h(-1). Mo acetylide oxo-peroxo species is formed in situ by reaction of 1 with TBHP during the course of reaction as catalytically active species. Interestingly even though the catalytically active species is homogeneous in nature it could be recycled very easily by recovering the catalytically active species as solid after addition of diethyl ether, and separating the products into organic phase. In the case of ethyl benzene oxidation, even after three recycles no appreciable loss in ethyl benzene conversion and acetophenone selectivity was observed. This complex showed high catalytic activity for the oxo functionalization of other alkyl aromatics and alkanes such as substituted ethyl benzenes, toluene as well as cyclohexane. TBHP was found to be more efficient oxidant than hydrogen peroxide for this oxidation. (C) 2016 Elsevier B.V. All rights reserved.

10aAlkyl aromatics10aCarbonyl compounds10aHomogeneous catalysis10aMolybdenum acetylide complex10aOxo-peroxo species1 aKhomane, Sonali, B.1 aDoke, Dhananjay, S.1 aDongare, M., K.1 aHalligudi, S., B.1 aUmbarkar, S., B. uhttps://library.ncl.res.in/content/efficient-oxidation-ethyl-benzene-using-situ-generated-molybdenum-acetylide-oxo-peroxo02221nas a2200265 4500008004100000022001400041245011700055210006900172260000800241300001400249490000700263520134800270653001701618653001701635653002001652653001501672653001501687100002801702700002101730700002201751700001601773700002201789700001301811856013101824 2018 eng d a1533-488000aCyclohexylation of resorcinol with cyclohexanol catalyzed by tungstophosphoric acid supported zirconia catalysts0 aCyclohexylation of resorcinol with cyclohexanol catalyzed by tun cAPR a2986-29920 v183 a

We demonstrate a highly active and reusable heterogeneous catalyst system, tungstophosphoric acid (TPA) supported on zirconia (ZrO2), for the cyclohexylation of resorcinol by cyclohexanol to produce value added chemicals such as 2-cyclohexyl resorcinol, 4-cyclohexyl resorcinol and 3-Hydroxy cyclohexyl phenyl ether under liquid phase reaction condition. TPA/ZrO2 catalysts prepared with different TPA loadings (5-30 wt.%) by wet impregnation method and calcined in the temperature range of 650-850 degrees C were characterized by Nitrogen sorption analysis, XRD, FTIR, DTG and DTA, and P-31 MAS NMR spectroscopy. Among the catalysts studied, 15 wt.% TPA/ZrO2 catalyst calcined at 750 degrees C gave the highest conversion of resorcinol (51.2%) with the selectivities for 3-Hydroxy cyclohexyl phenyl ether (53.9%) and 2-cyclohexyl resorcinol and 4-cyclohexyl resorcinol together (46.1%) under optimum reaction conditions. However, the selectivity of the products were controlled by varying the reaction conditions. At higher conversion of resorcinol (78.9%), only C-alkylated products were formed at 200 degrees C with 15 wt.% TPA/ZrO2 catalyst calcined at 750 degrees C. The combination of TPA and ZrO2 coupled with calcination temperature offered an excellent platform for the conversion of resorcinol into O- or C-alkylated products.

10a15% TPA/ZrO210aCyclohexanol10aCyclohexylation10aKeggin TPA10aResorcinol1 aBalasubramanian, V., V.1 aDevassay, B., M.1 aHalligudi, S., B.1 aDeepika, R.1 aUmbarakar, S., B.1 aVinu, A. uhttps://library.ncl.res.in/content/cyclohexylation-resorcinol-cyclohexanol-catalyzed-tungstophosphoric-acid-supported-zirconia01748nas a2200229 4500008004100000022001400041245009000055210006900145260000800214300001100222490000800233520095400241653003001195653002801225653003201253653002301285653002401308100001901332700002701351700002201378856011801400 2020 eng d a2468-823100aEfficacy of octahedral molecular sieves for green and sustainable catalytic reactions0 aEfficacy of octahedral molecular sieves for green and sustainabl cJUL a1109660 v4903 a

Sustainability and Green Chemistry has emerged as catchphrase in modern era and researchers worldwide have embraced it as new paradigm of development. In this context identifying potential materials able to curb multiple grave issues thus contributing towards sustainability is vital. Catalytic materials are quite potent for addressing current social, economic and environmental problems like harnessing alternative energy source, pollution prevention/remediation and manufacturing of commodity chemicals. Thus, the present review accentuates the efficacy of porous octahedral molecular sieves (OMS) as catalyst for such environmentally important reactions. It discusses about structural importance of OMS and their applications for green and sustainable catalytic reactions. Finally, the limitations are highlighted and future perspectives are presented which will ameliorate its catalytic utilization in energy and environmental domains.

10acatalytic transformations10aLignocellulosic biomass10aoctahedral molecular sieves10aplatform chemicals10arenewable feedstock1 aLucas, Nishita1 aGurrala, Lakshmiprasad1 aHalligudi, S., B. uhttps://library.ncl.res.in/content/efficacy-octahedral-molecular-sieves-green-and-sustainable-catalytic-reactions