@article { ISI:000230879600018, title = {Stereoselectivity ratios in a simple Diels-Alder reaction in aqueous salt solutions of alcohols}, journal = {Tetrahedron}, volume = {61}, number = {33}, year = {2005}, month = {AUG}, pages = {8025-8030}, publisher = {PERGAMON-ELSEVIER SCIENCE LTD}, type = {Article}, address = {THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND}, abstract = {

This is the first exhaustive report on the variation of stereoselectivity ratios for a simple Diels-Alder reaction between cyclopentadiene and methyl acrylate. The reaction was carried out in aqueous mixtures of methanol, ethanol, propan-1-ol and butan-1-ol in presence of LiClO4, LiCl, NaCl, KCl, CaCl2 and MgCl2. The endo sterecisomer decreases with the increase in carbon chain length of the alcohol. However, LiClO4, a salting-in agent in water becomes salting-out in aqueous mixtures of alcohols. The solvent properties, thus can be attuned by adjusting the amount of solvents and salts. (c) 2005 Elsevier Ltd. All rights reserved.

}, keywords = {aqueous alcohols, Diels-Alder reaction, endolexo ratios, salts}, issn = {0040-4020}, doi = {10.1016/j.tet.2005.06.010}, author = {Deshpande, Suvarna S. and Kumar, Anil} } @article { ISI:000292011000004, title = {Eutectic mixture-directed kinetics of Diels-Alder reaction}, journal = {Indian Journal of Chemistry Section A-Inorganic Bio-Inorganic Physical Theoretical \& Analytical Chemistry}, volume = {50}, number = {6}, year = {2011}, month = {JUN}, pages = {788-792}, publisher = {NATL INST SCIENCE COMMUNICATION-NISCAIR}, address = {DR K S KRISHNAN MARG, PUSA CAMPUS, NEW DELHI 110 012, INDIA}, abstract = {

In the search for environmentally benign solvent media, a new class of solvents composed of mixtures of carbohydrates with urea or methylated urea has been noted to be effective in enhancing the reaction rates of a bimolecular organic reaction like the Diels-Alder reaction of cyclopentadiene with methyl acrylate. The viscosity of these media appears to be an important parameter in controlling the second order kinetics.

}, keywords = {carbohydrates, Cycloaddition, Diels-Alder reaction, Dimethylurea, kinetics, Reaction rates, solvent effects, Urea, viscosity}, issn = {0376-4710}, author = {Nagare, Amit S. and Kumar, Anil} } @article { ISI:000365445500001, title = {Water-promoted diels-alder reaction in quaternary ammonium salts}, journal = {Journal of Physical Organic Chemistry}, volume = {28}, number = {11}, year = {2015}, month = {NOV}, pages = {665-673}, publisher = {WILEY-BLACKWELL}, address = {111 RIVER ST, HOBOKEN 07030-5774, NJ USA}, abstract = {

{Prevailing classification of salts based on their effect in solubility and stability of proteins in aqueous solution predicts that tetraalkylammonium salts, guanidinium chloride (GnCl), LiClO4 act as salting-in (S/I) and LiCl, NaCl act as salting-out (S/O) in aqueous conditions. In the same context the behaviour of GnCl, LiClO4 and LiCl are contradictory in polar solvents like ethylene glycol and formamide. In these solvents, expected salt effect shows just opposite nature from their usual expectation. However, in the aqueous solution salts like tetraalkylammonium halide (R4NX

}, keywords = {Delta G(solvation), Diels-Alder reaction, k(s), kinetic study, solubility, tetraalkylammonium salts, viscosity}, issn = {0894-3230}, doi = {10.1002/poc.3469}, author = {Nagare, Amit S. and Manna, Arpan and Sonawane, Pramod D. and Kumar, Anil} } @article { ISI:000381182700004, title = {Spectacular rate enhancement of the diels-alder reaction at the ionic liquid/n-hexane interface}, journal = {Chemphyschem}, volume = {17}, number = {13}, year = {2016}, month = {JUL}, pages = {1969-1972}, publisher = {WILEY-V C H VERLAG GMBH}, address = {POSTFACH 101161, 69451 WEINHEIM, GERMANY}, abstract = {

The use of the ionic liquid/n-hexane interface as a new class of reaction medium for the Diels-Alder reaction gives large rate enhancements of the order of 10(6) to 10(8) times and high stereoselectivity, as compared to homogeneous media. The rate enhancement is attributed to the H-bonding abilities and polarities of the ionic liquids, whereas the hydrophobicity of ionic liquids was considered to be the factor in controlling stereoselectivity.

}, keywords = {Diels-Alder reaction, Interfaces, ionic liquids, kinetics, stereoselectivity}, issn = {1439-4235}, doi = {10.1002/cphc.201600006}, author = {Beniwal, Vijay and Manna, Arpan and Kumar, Anil} }