@article { ISI:000244183400009, title = {[SbW9O33]-based polyoxometalate combined with a phase transfer catalyst: A highly effective catalyst system for selective oxidation of alcohols with H2O2, and spectroscopic investigation}, journal = {Journal of Molecular Catalysis A-Chemical}, volume = {262}, number = {1-2}, year = {2007}, month = {FEB}, pages = {52-58}, publisher = {ELSEVIER SCIENCE BV}, type = {Article}, address = {PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS}, abstract = {

Na-9[SbW9O33] in conjunction with a phase transfer catalyst, methyltricapryl ammonium chloride, is highly efficient for selective oxidation of variety of alcohols with aq. H2O2 to yield corresponding carbonyls. Most importantly the reactions are carried out in the absence of any organic solvents especially halogenated solvents. In case of allylic alcohols, the catalyst is highly selective for the alcohol oxidation reaction and least selective for epoxidation reaction in the presence of aq. H2O2. IR studies support the formation of W-peroxo intermediate species and also support the stability of the catalyst in the presence of phase transfer compound under the present experimental condition. The catalyst can be reused after careful decomposition of peroxide of the final reaction mixture. (c) 2006 Elsevier B.V. All rights reserved.

}, keywords = {Alcohol, Aq.H2O2, Nag[SbW9O33], Oxidation, Phase transfer catalyst, Polyoxometalate, polyoxotungstate}, issn = {1381-1169}, doi = {10.1016/j.molcata.2006.08.050}, author = {Ingle, Rohit H. and Raj, N. K. Kala and Manikandan, Palanichamy} } @article { ISI:000347717000009, title = {Direct synthesis of secondary amines from alcohols and ammonia catalyzed by a ruthenium pincer complex}, journal = {Catalysis Letters}, volume = {145}, number = {1}, year = {2015}, month = {JAN}, pages = {139-144}, publisher = {SPRINGER}, address = {233 SPRING ST, NEW YORK, NY 10013 USA}, abstract = {

Efficient and selective direct synthesis of secondary amines from primary alcohols and ammonia with liberation of water has been achieved, with high turnover numbers and with no generation of waste. In case of benzylic alcohols, imines rather than amines are obtained. This atom economical, environmentally benign reaction is homogenously catalyzed by a well-defined bipyridine based Ru(II)-PNN pincer complex.

}, keywords = {Alcohol, Ammonia, Homogenous catalysis, Ru-pincer complex, Secondary amine}, issn = {1011-372X}, doi = {10.1007/s10562-014-1422-2}, author = {Balaraman, Ekambaram and Srimani, Dipankar and Diskin-Posner, Yael and Milstein, David} } @article {45887, title = {Selective aerobic oxidation of alcohols over Au-Pd/sodium titanate nanotubes}, journal = {Catalysis Communications}, volume = {58}, year = {2015}, month = {JAN }, pages = {149-153}, type = {Article}, abstract = {

catalytic application of Au-Pd nanoparticles supported on sodium titanate nanotubes (NaTNTs) for liquid-phase aerobic oxidation of alcohols is reported, for the first time. This reaction occurs at 80-120 degrees C, 1 atm and solvent-/alkali-free conditions yielding the corresponding carbonyls in high selectivity. This catalyst was reusable and found to be more active/selective than the corresponding monometallic Au and Pd catalysts and Au-Pd/TiO2. Higher dispersion, smaller particle size and higher amount of electron density at gold are the causes for the superior activity of Au-Pd/NaTNT catalyst. (C) 2014 Elsevier B.V. All rights reserved.

}, keywords = {aerobic oxidation, Alcohol, Bimetallic Au-Pd catalyst, Sodium titanate nanotubes, TiO2}, issn = {1566-7367}, doi = {10.1016/j.catcom.2014.09.018}, author = {Nepak, Devadutta and Darbha, Srinivas} } @article {46993, title = {Manganese-catalyzed alpha-olefination of nitriles with secondary alcohols}, journal = {ACS Catalysis}, volume = {10}, year = {2020}, month = {JAN}, pages = {947-954}, type = {Article}, abstract = {

An expedient catalytic approach for alpha-olefination of nitriles using secondary alcohols with the liberation of molecular hydrogen and water as the only byproducts is reported. This reaction is catalyzed by a molecularly defined manganese(I) pincer complex and operates in the absence of any hydrogen acceptors. A broad range of substrates including cyclic, acyclic, and benzylic alcohols, as well as various nitrile derivatives, such as arylmethyl and heteroarylmethyl nitriles, are employed in the reaction to provide a diverse range of alpha-vinyl nitriles in good to excellent yields. Mechanistic studies showed that the reaction proceeds via dehydrogenative pathway and the activation of alpha(C-H) bond of the alcohol is the rate-determining step.

}, keywords = {acceptorless dehydrogenation, Alcohol, alpha-olefination, Hydrogen, manganese}, issn = {2155-5435}, doi = {10.1021/acscatal.9b02811}, author = {Yadav, Vinita and Landge, Vinod G. and Subaramanian, Murugan and Balaraman, Ekambaram} } @article {47704, title = {Phosphine-free manganese(II)-catalyst enables acceptorless dehydrogenative coupling of alcohols with indoles}, journal = {Advanced Synthesis \& Catalysis}, volume = {363}, year = {2021}, month = {SEP }, pages = {4430-4439}, type = {Article}, abstract = {Herein, an air-stable, molecularly defined NNN-Mn(II) pincer complex catalyzed acceptorless dehydrogenative coupling of alcohols with indoles is reported. A wide variety of symmetrical and unsymmetrical bis(indolyl)methane derivatives as well as some structurally important products such as Vibrindole A, Turbomycin B alkaloid, Antileukemic, and Anticancer agents were synthesized. Mechanistic studies illustrate the importance of the NH moiety in the complex and the crucial role of metal-ligand cooperation during catalysis.}, keywords = {acceptorless dehydrogenation, Alcohol, Indole, manganese, phosphine-free}, issn = {1615-4150}, doi = {10.1002/adsc.202100621}, author = {Yadav, Vinita and Balaraman, Ekambaram and Mhaske, Santosh B.} }