@article { ISI:000242960400008, title = {Phosphotungstic acid as an efficient solid catalyst for intramolecular rearrangement of benzyl phenyl ether to 2-benzyl phenol}, journal = {Catalysis Communications}, volume = {8}, number = {2}, year = {2007}, month = {FEB}, pages = {139-144}, publisher = {ELSEVIER SCIENCE BV}, type = {Article}, address = {PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS}, abstract = {

An heteropoly acid (phosphotungstic acid, PTA) was found to be a promising solid acid catalyst as an alternative to the conventional stoichiometric reagents for the rearrangement of benzyl phenyl ether giving 2-benzyl phenol as a major product and 4-benzyl phenol and dibenzylated phenols as side products. Catalyst was recovered from the reaction mixture and reused again without loss of activity. Based on the observed product distribution for various substrates a plausible catalytic reaction pathway has also been proposed. (c) 2006 Elsevier B.V. All rights reserved.

}, keywords = {benzyl phenyl ether, Intramolecular rearrangement, Phosphotungstic acid}, issn = {1566-7367}, doi = {10.1016/j.catcom.2006.05.046}, author = {Bhure, Mahesh H. and Rode, Chandrashekhar V. and Chikate, Rajeev C. and Patwardhan, Neeraj and Patil, Shraddha} } @article { ISI:000256183700015, title = {Phosphotungstic acid on silica with modified acid sites as a solid catalyst for selective cleavage of tert-butyldimethylsilyl ethers}, journal = {Catalysis Communications}, volume = {9}, number = {9}, year = {2008}, month = {MAY}, pages = {1863-1868}, publisher = {ELSEVIER SCIENCE BV}, address = {PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS}, abstract = {

The strength and nature of acid sites of bulk phosphotungstic acid could be modified after dispersing it on silica support which was characterized by XRD, ammonia TPD and (31)P MAS NMR techniques. This solid acid catalyst was found to be highly selective for the cleavage of tert-butyldimethylsilyl ethers at room temperature. The catalyst was easily recovered by filtration and could be reused for several times without loss of any activity giving a TON of 9.5 x 10(5). (C) 2008 Elsevier B.V. All rights reserved.

}, keywords = {Ammonia TPD, Catalytic cleavage, reaction pathway, solid acid, tert-butyldimethylsilyl ethers, XRD}, issn = {1566-7367}, doi = {10.1016/j.catcom.2008.03.017}, author = {Bhure, Mahesh H. and Kumar, Indresh and Natu, Arun D. and Chikate, Rajeev C. and Rode, Chandrashekhar V.} } @article { ISI:000266094300033, title = {Phase behavior of hydrogenation of 2-tert-butylphenol over a charcoal-supported rhodium catalyst in carbon dioxide solvent}, journal = {Journal of Chemical and Engineering Data}, volume = {54}, number = {5}, year = {2009}, month = {MAY}, pages = {1610-1612}, publisher = {AMER CHEMICAL SOC}, address = {1155 16TH ST, NW, WASHINGTON, DC 20036 USA}, abstract = {

Catalytic hydrogenation of 2-tert-butyl phenol over a charcoal-supported rhodium catalyst in carbon dioxide solvent at 313 K was studied in a batch reactor. To elucidate the effect of carbon dioxide pressure on the initial rate of reaction, the phase behavior of the ternary (2-tert-butylphenol-carbon dioxide-hydrogen) system was separately observed with a view cell, and the calculations of vapor-liquid equilibrium and compositions in the vapor and liquid phases inside the reactor were carried out using the Peng-Robinson equation of state. The hydrogenation behavior in the carbon dioxide solvent is discussed based on the phase behavior of the ternary system.

}, issn = {0021-9568}, doi = {10.1021/je800932w}, author = {Hiyoshi, Norihito and Masuda, Yoshio and Sato, Osamu and Yamaguchi, Aritomo and Rode, Chandrashekhar V. and Shirai, Masayuki} } @article { ISI:000280359700010, title = {Pd-functionalized carbon nanotubes for selective hydrogenation of 2-butyne-1,4-diol}, journal = {Advanced Science Letters}, volume = {3}, number = {3}, year = {2010}, month = {SEP}, pages = {313-318}, publisher = {AMER SCIENTIFIC PUBLISHERS}, address = {26650 THE OLD RD, STE 208, VALENCIA, CA 91381-0751 USA}, abstract = {

Multiwalled carbon nanotubes were prepared by thermal decomposition method followed by acid treatment and Pd-functionalization with PdCl2 by wet impregnation method. The Pd functionlized carbon nanotubes catalyst was characterized by BET, FT-IR, Raman, XRD, EDX, ICP-OES, SEM and TEM and was evaluated for its activity for hydrogenation of 2-butyne-1,4-diol. It showed higher selectivity (93\%) to 2-butene-1,4-diol than Pd supported on commercial carbon (70\% selectivity to 2-butene-1,4-diol) for complete conversion of 2-butyne-1,4-diol. The catalyst also exhibited excellent stability as evidenced by the three catalyst recycle experiments.

}, issn = {1936-6612}, doi = {10.1166/asl.2010.1128}, author = {Nadgeri, Jayprakash M. and Garade, Ajit C. and Tambe, Romana A. and Gokhale, Suresh P. and Rode, Chandrashekhar V.} } @article { ISI:000285951200017, title = {Proline catalyzed direct diastereoselective 6-enolexo aldolization: toward the synthesis of the imino sugar DNJ}, journal = {Tetrahedron-Asymmetry}, volume = {21}, number = {21-22}, year = {2010}, month = {NOV}, pages = {2703-2708}, publisher = {PERGAMON-ELSEVIER SCIENCE LTD}, address = {THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND}, abstract = {

A L-proline catalyzed direct diastereoselective 6-enolexo aldolization reaction of differentiating dialdehydes derived from tartaric acid is presented This organocatalytic approach provides high levels of synselectivity (dr \> 10 1) with the stereocontrolled C-C bond formation between C4 and C5 intramolecularly which can serve to synthesize Imino-sugar skeleton quickly (C) 2010 Elsevier Ltd All rights reserved

}, issn = {0957-4166}, doi = {10.1016/j.tetasy.2010.10.024}, author = {Kumar, Indresh and Rode, Chandrashekhar V.} }