@article {46994,
	title = {Functionalization of alkynes and alkenes using a cascade reaction approach: synthesis of beta-keto sulfones under metal-free conditions},
	journal = {Journal of Organic Chemistry},
	volume = {85},
	year = {2020},
	month = {JAN},
	pages = {716-725},
	type = {Article},
	abstract = {<p>Here, we are reporting a multicomponent cascade reaction approach for the synthesis of beta-keto sulfones by exploiting differential reactivity pattern of substrates under open-atmosphere and metal-free conditions. The coupling partners are aryldiazonium salts, unsaturated compounds, and DABSO. The optimized conditions worked well with both alkenes and alkynes. Moreover, the reaction also works with metabisulfite for the source of sulfone. The controlled liquid chromatography-mass spectrometry and O-18-labelled experiments suggested that air is a source of the incoming oxygen atom of the keto group of beta-keto sulfones.</p>
},
	issn = {0022-3263},
	doi = {10.1021/acs.joc.9b02779},
	author = {Kumar, Mukesh and Ahmed, Riyaz and Singh, Maninder and Sharma, Shweta and Thatikonda, Thanusha and Singh, Parvinder Pal}
}
@article {47731,
	title = {Selective production of C9 monomeric phenols via hydrogenolysis of lignin using Pd-(W/Zr/Mo oxides)-supported on biochar catalyst},
	journal = {Fuel},
	volume = {308},
	year = {2022},
	month = {JAN },
	pages = {121818},
	type = {Article},
	abstract = {Valorizing lignin to phenolic monomers and fine chemicals is an essential component of a sustainable biorefinery that uses lignocellulosic feedstocks. In this study, Pd-metal oxides (ZrO2, WOx, MoO3) supported on activated biochar (ABC) catalysts were developed for hydrogenolysis of lignin. The metals (2\% Pd, 5\% Zr, 5\% W, 5\% Mo) were supported on activated biochar using the wetness impregnation method, and the catalysts were extensively characterized. The effect of addition of secondary metals on active surface properties such as acidity, Pd metal particle size and dispersion were also evaluated. The selectivity to C9 monomeric phenols followed the trend: 2Pd-5Mo/ABC (57.3\%) > 2Pd-5Zr/ABC (49.2\%) > 2Pd-5W/ABC (45\%) > 2Pd/ABC (42.9\%). The maximum C9 phenolic monomer yield achieved in this study was similar to 22 wt\%. The fractional conversion of lignin was 67-69\% with Pd-metal oxide catalysts. The presence of Mo in the catalyst inhibited the hydrogenation of aliphatic C-alpha = C-beta in lignin and led to the formation of t-isoeugenol, while the presence of W and Zr resulted in selective formation of the hydrogenated product, propyl guaiacol. Using model compounds, it is proved that the formation of propyl guaiacol is via hydrogenation of t-isoeugenol, and not through dehydroxylation of propanol guaiacol. The dehydroxylation activity of the catalysts is attributed to the higher Lewis acidity and electropositive nature of the metals. A notable carbon atom economy of 47-50\% towards total phenolic monomers was achieved with 2Pd/ABC, 2Pd-5Mo/ABC and 2Pd-5Zr/ABC catalysts.},
	keywords = {Activated biochar, Guaiacol, Hydrogenolysis, lignin, Metal oxides, Palladium},
	issn = {0016-2361},
	doi = {10.1016/j.fuel.2021.121818},
	author = {Gurrala, Lakshmiprasad and Kumar, M. Midhun and Sharma, Shweta and Paek, Changyub and Vinu, R.}
}
@article {48313,
	title = {Nitric acid free cyclohexane to adipic acid production using nickel and vanadium incorporated AlPO-5 molecular sieve},
	journal = {Molecular Catalysis},
	volume = {540},
	year = {2023},
	month = {APR },
	pages = {113051},
	type = {Article},
	abstract = {<p>
	Rationally designing a stable and sustainable metal oxide supported over the molecular sieve catalysts for oxidizing cyclohexane (CYH) to adipic acid (AA) is vital in industrial applications. The in-situ hydrothermal synthesis method successfully incorporated vanadium and nickel into the aluminium phosphate-5 (AlPO-5) molecular sieves (MFI structure). The XPS and NH3 TPD analysis disclosed that the addition of Ni into V-AlPO-5 stabilizes the ratio of V4+/V5+, creating strong acidic sites and the formation of NiOOH, which are a vital role for the selective CYH oxidation to AA. An in-situ DRIFT study reveals that nickel takes part in the formation of dicarboxylate ions as an intermediate to form AA. Our catalytic studies profoundly suggested that the Ni0.1V0.2AlPO-5 catalyst used for CYH oxidation gives better selectivity towards AA (53\%) in the presence of oxygen at an appropriate amount of solvent without an initiator or promoter within a short time (3h).</p>
},
	keywords = {Adipic Acid, Cyclohexane oxidation, In situ DRIFT, NiOOH, NiVAlPO-5, Ratios ofV4+, V5+},
	issn = {2468-8231},
	doi = {10.1016/j.mcat.2023.113051},
	author = {Prabu, Marimuthu and Sharma, Shweta and Raja, Abhishekram and Archana, Ramakrishnan and Samruddhi, Mane and Raja, Thirumalaiswamy}
}
