@article {48169,
	title = {Efficient cascade C-N coupling reactions catalyzed by a recyclable MoOx/ Nb2O5 nanomaterial for valuable N-heterocycles synthesis},
	journal = {Molecular Catalysis},
	volume = {532},
	year = {2022},
	month = {NOV},
	pages = {112742},
	type = {Article},
	abstract = {<p>
	The efficient cascade synthesis of pharmaceutically valuable N-heterocycles at solvent-free conditions was achieved using a robust, recyclable MoOx/Nb2O5 nanocatalyst. The results of catalyst screening revealed that the MoOx/Nb2O5 nanorods, calcined at 500 degrees C (MoNb5), exhibit excellent catalytic activity in the oxidative coupling of benzylamine with 96.5\% conversion and \&gt;99.6\% selectivity to the desirable imine product. The uniform dispersion of Mo-oxide nanoparticles (average particle size: 5.2 +/- 0.5 nm) on shape-controlled Nb2O5 nanorods (width: 5.3 +/- 0.5 nm and length: 23-38 nm) in MoNb5 catalyst led to improved structural and acid properties, beneficial for the cascade C-N bond construction. The shape-controlled MoNb5 catalyst showed versatile activity in various cascade C-N coupling reactions to obtain 2-phenylbenzimidazole, 2-phenyl-quinaxoline, and 2-phenyl-2,3-dihydroquinazolin-4(1H)-one with good to excellent yields at solvent-free con-ditions. The optimum ratio of Lewis/Bronsted acid sites, the unique structure of Nb2O5 nanorods, and the strong MoO3-Nb2O5 interaction are the key reasons for the higher activity of MoNb5 catalyst. The efficient reusability of MoNb5 catalyst, its remarkable activity in diverse N-heterocycles synthesis, and efficient gram-scale synthesis emphasize its practical application for the cascade C-N coupling reactions under benign conditions.</p>
},
	keywords = {Acid sites optimization, Cascade C-N bond formation, Diverse nitrogenous chemicals, Heterogeneous nanosized catalyst, MoO3-Nb2O5 interaction, Nb2O5 nanorods},
	issn = {2468-8231},
	doi = {10.1016/j.mcat.2022.112742},
	author = {Singh, Nittan and Kalbande, Pavan Narayan and Umbarkar, Shubhangi and Sudarsanam, Putla}
}
@article {48101,
	title = {Efficient synthesis of 5-(hydroxymethyl)furfural esters from polymeric carbohydrates using 5-(chloromethyl)furfural as a reactive intermediate},
	journal = {ACS Sustainable Chemistry \& Engineering},
	volume = {10},
	year = {2022},
	month = {MAY},
	pages = {5803-5809},
	type = {Article},
	abstract = {<p>
	This work reports an efficient, gram-scale synthesis of 5-(hydroxymethyl)furfural (HMF) esters using biomass-derived 5-(chloromethyl)furfural (CMF) as a reactive intermediate. The HMF-esters have potential applications as chemicalintermediates, fuel additives, and bioactive compounds. Initially, CMF was prepared in good yields directly from polymericcarbohydrates (starch, inulin, and cellulose) and cellulosic materials (cotton andfilter paper) using a biphasic batch reaction system,consisting of aqueous hydrochloric acid and 1,2-dichloroethane. The use of ZnCl2as an additive allowed the reaction to proceedunder milder conditions while significantly improving the isolated yield of CMF. The effects of reaction temperature, reaction time,extracting solvent, and ZnCl2loading on CMF yield were investigated. Microcrystalline cellulose was converted into CMF with a72\% isolated yield under optimized reaction conditions (80 degrees C, 2 h). After that, CMF was transformed into various novel esters ofHMF in excellent isolated yields (\&gt;85\%) by reacting with a slight excess amount of the triethylammonium salt of various alkyl/arylcarboxylic acids under solvent-free conditions</p>
},
	keywords = {catalysis, cellulose, furanics, HMF-esters, renewable synthesis},
	issn = {2168-0485},
	doi = {10.1021/acssuschemeng.1c08571},
	author = {Bhat, Navya Subray and Hegde, Shobhita L. and Dutta, Saikat and Sudarsanam, Putla}
}
@article {49233,
	title = {Efficient glycolysis of used PET bottles into a high-quality valuable monomer using a shape-engineered MnO nanocatalyst},
	journal = {CATALYSIS SCIENCE \& TECHNOLOGY},
	volume = {14},
	year = {2024},
	month = {SEP },
	type = {Journal Article},
	keywords = {Catalyst, kinetics, Nanorods, Oxidation, Oxides, POLY(ETHYLENE-TEREPHTHALATE), WASTE},
	issn = {2044-4753},
	doi = {10.1039/d4cy00823e},
	author = {Swapna, Bhattu and Singh, Nittan and Patowary, Suranjana and Bharali, Pankaj and Madras, Giridhar and Sudarsanam, Putla}
}
