@article { ISI:000229592000044, title = {Copper- and ligand-free sonogashira reaction catalyzed by Pd(0) nanoparticles at ambient conditions under ultrasound irradiation}, journal = {Journal of Organic Chemistry}, volume = {70}, number = {12}, year = {2005}, month = {JUN}, pages = {4869-4872}, publisher = {AMER CHEMICAL SOC}, type = {Article}, address = {1155 16TH ST, NW, WASHINGTON, DC 20036 USA}, abstract = {

The Sonogashira reaction proceeds at ambient temperature (30 degrees C) in acetone or room-temperature ionic liquid, 1,3-di-n-butylimidazolium tetrafluoroborate ([bbim]BF4), as solvent under ultrasound irradiation to give enhanced reaction rates, excellent chemoselectivity, and high yields in the absence of a copper cocatalyst and a phosphine ligand. TEM analysis showed the formation of stable, crystalline, and polydispersed Pd(0) nanoparticles as catalyst for the reaction.

}, issn = {0022-3263}, doi = {10.1021/jo0503815}, author = {Gholap, Atul R. and Venkatesan, K. and Pasricha, R. and Daniel, Thomas and Lahoti, Rajgopal J. and Srinivasan, K. V.} } @article { ISI:000227273200009, title = {Novel one-pot synthesis of 2-Aryl-4(3H)-quinazolinones using room temperature ionic liquid as reaction medium as well as promoter}, journal = {Synthetic Communications}, volume = {35}, number = {2}, year = {2005}, month = {JUL}, pages = {231-241}, publisher = {MARCEL DEKKER INC}, type = {Article}, address = {270 MADISON AVE, NEW YORK, NY 10016 USA}, abstract = {

An efficient one-pot synthesis of 2-aryl-4(3H)-quinazolinones from 2-amino benzamides and substituted benzoyl chlorides in a room temperature ionic liquid is described. Compared with the classical reaction conditions, this new synthetic method has the advantages of recyclability of ionic liquid, very good to excellent yields (78-92\%), the absence of hazardous and expensive catalysts, and easy workup procedures giving rise to a process with minimum waste.

}, keywords = {2-amino benzamide, 2-aryl-4(3H)-quinazolinones, benzoyl chlorides, Ionic liquid}, issn = {0039-7911}, doi = {10.1081/SCC-200048433}, author = {Potewar, T. M. and Nadaf, R. N. and Daniel, Thomas and Lahoti, Rajgopal J. and Srinivasan, K. V.} } @article { ISI:000227930800010, title = {Room temperature ionic liquid promoted improved and rapid synthesis of 2,4,5-triaryl imidazoles from aryl aldehydes and 1,2-diketones or alpha-hydroxyketone}, journal = {Tetrahedron}, volume = {61}, number = {14}, year = {2005}, month = {APR}, pages = {3539-3546}, publisher = {PERGAMON-ELSEVIER SCIENCE LTD}, type = {Article}, address = {THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND}, abstract = {

An improved and rapid one-pot synthesis of 2,4,5-triaryl imidazoles in a room temperature ionic liquid is described, which does not need any added catalyst. Different ionic liquids based on 1-n-butyl and 1,3-di-n-butyl imidazolium salts were screened and their efficacy in terms of acidity and polarity have been correlated with yields and reaction period. The one-pot methodology resulting in excellent isolated yields in short reaction times is characterized by simple work up procedures and efficient recovery and recycling of the ionic liquid, which acts as a promoter. (c) 2005 Elsevier Ltd. All rights reserved.

}, keywords = {1, 2, 2-Diketones, 4, 5-triaryl imidazoles, alpha-hydroxyketone, ammonium acetate, benzaldehydes, ionic liquid (IL)}, issn = {0040-4020}, doi = {10.1016/j.tet.2005.01.116}, author = {Siddiqui, S. A. and Narkhede, U. C. and Palimkar, S. S. and Daniel, Thomas and Lahoti, Rajgopal J. and Srinivasan, K. V.} } @article { ISI:000238963800023, title = {Copper-, ligand- and solvent-free synthesis of ynones by coupling acid chlorides with terminal alkynes}, journal = {Tetrahedron Letters}, volume = {47}, number = {31}, year = {2006}, month = {JUL}, pages = {5527-5530}, publisher = {PERGAMON-ELSEVIER SCIENCE LTD}, type = {Article}, address = {THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND}, abstract = {

A general and efficient copper-, ligand- and solvent-free synthesis of ynones by coupling of a wide range of acid chlorides with terminal alkynes catalyzed by palladium(II) acetate at room temperature is reported. (c) 2006 Elsevier Ltd. All rights reserved.

}, keywords = {ligandless, neat, ynones}, issn = {0040-4039}, doi = {10.1016/j.tetlet.2006.05.166}, author = {Palimkar, Sanjay S. and Kumar, P. Harish and Jogdand, Nivrutti R. and Daniel, Thomas and Lahoti, Rajgopal J. and Srinivasan, Kumar V.} } @article { ISI:000236913600006, title = {Natural kaolinitic clay: a remarkable catalyst for highly regioselective chlorination of arenes with Cl-2 or SO2Cl2}, journal = {Indian Journal of Chemistry Section B-Organic Chemistry Including Medicinal Chemistry}, volume = {45}, number = {4}, year = {2006}, month = {APR}, pages = {972-975}, publisher = {NATL INST SCIENCE COMMUNICATION}, type = {Article}, address = {DR K S KRISHNAN MARG, NEW DELHI 110 012, INDIA}, abstract = {

Natural kaolinitic clay containing transition metals such as Fe and Ti in its lattice has been found to exhibit unusual regioselectivity in the liquid-phase chlorination of arenes with either Cl-2 or SO2Cl2 as the chlorinating agent para-Chlorinated products are predominant for most of the substrates with an exceptional case of ortho-selectivity for the chlorination of aniline.

}, keywords = {Aniline, chlorination, chlorine, ortho-chloroaniline, sulfuryl chloride}, issn = {0376-4699}, author = {Jayachandran, B. and Phukan, P. and Daniel, Thomas and Sudalai, A.} } @article {Datar, title = {Remarkably rapid regioselective synthesis of beta-enaminones using silica chloride in a heterogeneous as well as an ionic liquid in a homogeneous medium at room temperature}, journal = {Journal of Molecular Catalysis A-Chemical}, volume = {245}, number = {1-2}, year = {2006}, note = {6th International Conference on Solvothermal Reactions, Mysore, INDIA, AUG 24-27, 2004}, month = {FEB}, pages = {37-46}, publisher = {ACADEMIC PRESS INC ELSEVIER SCIENCE}, type = {Article}, address = {525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA}, abstract = {

{Silica chloride as a heterogeneous catalyst has been used for the regioselective synthesis of P-amino-a,P unsaturated esters and ketones. Similar regioselective synthesis was also performed using an ionic liquid 1-n-butyl imidazolium tetrafluoroborate [

}, keywords = {direct oxidation of H-2 to H2O2, H2O2 decomposition, H2O2 hydrogenation, Promoting action of chloride or bromide anions, supported Pd catalysts}, issn = {0021-9517}, doi = {10.1016/j.molcata.2005.09.021}, author = {Gholap, Atul R. and Chakor, N. S. and Daniel, Thomas and Lahoti, Rajgopal J. and Srinivasan, K. V.} } @article { ISI:000263749400010, title = {Efficient, rapid, and regioselective bromination of anilines and phenols with 1-butyl-3-methylpyridinium tribromide as a new reagent/solvent under mild conditions}, journal = {Tetrahedron Letters}, volume = {50}, number = {9}, year = {2009}, month = {MAR}, pages = {1007-1009}, publisher = {PERGAMON-ELSEVIER SCIENCE LTD}, address = {THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND}, abstract = {

1-Butyl-3-methylpyridinium tribromide, [BMPy]Br(3) proves to be a highly efficient, regioselective reagent/solvent for nuclear bromination of various anilines and phenols. The synthesis and characterization of the room temperature ionic liquid [BMPy]Br(3) (2) is described. The bromination was carried out in the absence of organic solvents and in most cases the only extraction solvent needed was water. The spent 1-butyl-3-methylpyridinium bromide (1) was easily recycled. (C) 2008 Elsevier Ltd. All rights reserved.

}, keywords = {Bromination, Ionic liquid, Regioselective, [BMPy]Br(3)}, issn = {0040-4039}, doi = {10.1016/j.tetlet.2008.12.053}, author = {Borikar, Sanjay P. and Daniel, Thomas and Paul, Vincent} } @article { ISI:000274424100003, title = {Mild, efficient, and regioselective monobromination of arylamines and phenols using [BBIm]Br-3 as a new reagent}, journal = {Synthetic Communications}, volume = {40}, number = {5}, year = {2010}, month = {APR}, pages = {PII 919083074}, publisher = {TAYLOR \& FRANCIS INC}, address = {325 CHESTNUT ST, SUITE 800, PHILADELPHIA, PA 19106 USA}, abstract = {

We report here an efficient method for the synthesis and characterization of the room-temperature ionic liquid 1,3-di-n-butylimidazolium tribromide ([BBIm]Br-3) (2) and its application as an efficient reagent and solvent for regioselective bromination of arylamines and phenols under mild conditions. The bromination was carried out in the absence of organic solvents, and in most cases, the only extraction solvent needed was water. The spent 1,3-di-n-butylimidazolium bromide (1) was easily recycled.

}, keywords = {Ionic liquid, monobromination, Regioselective, Solvent-free, [BBIm]Br3}, issn = {0039-7911}, doi = {10.1080/00397910903009430}, author = {Borikar, Sanjay P. and Daniel, Thomas and Paul, Vincent} } @article { ISI:000291262700018, title = {Aromatic bromination of aldehydes and ketones using 1,3-di-n-butylimidazolium tribromide [BBIm]Br3 ionic liquids under solvent-free conditions}, journal = {Journal of the Iranian Chemical Society}, volume = {8}, number = {2}, year = {2011}, month = {JUN}, pages = {531-536}, publisher = {SPRINGER}, address = {233 SPRING ST, NEW YORK, NY 10013 USA}, abstract = {

An environmentally benign and efficient process for the preparation of monobromo derivatives of aryl aldehydes and ketones was developed by simple and practical reactions of aryl aldehydes or ketones with 1,3-di-n-butylimidazolium tribromide ([BBIm]Br-3), as a brominating reagent under solvent-free conditions in very high yields. The process has several advantages: high conversions, short reaction time, mild reaction conditions, simple workup with good to quantitative yields and re-usable ionic liquid.

}, keywords = {Bromination, green chemistry, Ionic liquid, Solvent-free, [BBIm]Br-3}, issn = {1735-207X}, doi = {10.1007/BF03249087}, author = {Borikar, Sanjay P. and Daniel, Thomas} } @article { ISI:000291899200004, title = {Convenient and efficient protocol for the synthesis of acylals catalyzed by bronsted acidic ionic liquids under ultrasonic irradiation}, journal = {Ultrasonics Sonochemistry}, volume = {18}, number = {5}, year = {2011}, month = {SEP}, pages = {928-931}, publisher = {ELSEVIER SCIENCE BV}, address = {PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS}, abstract = {

The synthesis of acylals (1,1-diacetates) via the reactions of aldehydes with acetic anhydride was carried Out in 85-97\% yields at room temperature under ultrasound irradiation catalyzed by the Bronsted acidic ionic liquid [bmpy]HSO(4). This method provides several advantages, such as solvent-free conditions, operational simplicity, higher yields, and reduced environmental consequences. The ionic liquid was recovered and reused. (C) 2011 Elsevier B.V. All rights reserved.

}, keywords = {1, 1-Butyl-3-methylpyridinium hydrogen sulfate, 1-Diacetates, Acylals, Ionic liquid, Solvent-free, Ultrasonic irradiation}, issn = {1350-4177}, doi = {10.1016/j.ultsonch.2011.03.022}, author = {Borikar, Sanjay P. and Daniel, Thomas} }