02698nas a2200217   4500008004100000022001400041245017800055210006900233260000800302300001100310490000800321520186300329653002402192653002602216653002002242653001402262100002602276700002402302700002502326856012902351       2024                        eng d  a0961-953400aDirect oxidation of alcohols to carboxylic acids using simple and economical Pd@Glu-HTC catalyst: practical and scalable approach towards biomass based value added chemicals0 aDirect oxidation of alcohols to carboxylic acids using simple an  cAUG  a1072900 v1873 a<p>
	Sustainable catalytic transformation of bio-based alcohols to high value-added fine chemicals is an important topic of research. This work described preparation of simple and economical Pd@Glu-HTC catalyst from biomass derived low cost D-glucose. Hydrothermal carbonization of glucose was carried out in first step to synthesize GluHTC support in a simpler, greener, economical and efficient manner followed by incorporation of palladium metal on surface of the catalyst in second step. The catalyst was characterized using techniques such as Fourier Transform Infrared Spectroscopy (FT-IR), Solid-state Cross-Polarization Magic Angle Spinning Carbon-13 (13C CPMAS), Energy-dispersive X-ray spectroscopy (EDAX), Powder X-ray diffraction (P-XRD), X-ray photoelectron spectroscopy (XPS), Thermogravimetric/Differential Thermal Analyzer (TG-DTA), Field emission scanning electron microscopy (FE-SEM) and High-resolution transmission electron microscopy (HR-TEM). The catalyst was evaluated for direct oxidation of alcohols to yield carboxylic acids and exhibited very good catalytic activity for wider substrate scope. Oxidation of alcohols was carried out using milder base, molecular oxygen and water as a solvent to achieve 92-99 % excellent yields. The practical utility of current strategy was also studied for gram scale synthesis of bio-based value added industrially important chemicals such as furoic acid (flavouring agent and preservative in industry), 2, 5-furan-dicarboxylic acid (monomer to 100 % fossil-free, recyclable polymer polyethylene furanoate (PEF), tetrahydro-2-furoic acid (production of many drugs) and vanillin (important product of flavor and fragrance industry). Pd@Glu-HTC catalyst was found to be reusable for four recycles and the catalytic performance was retained without any loss in its activity after four cycles.</p>
10aBio-based chemicals10aCarbonaceous catalyst10aCarboxylic acid10aOxidation1 aKirdant, Swapnali, P.1 aBankar, Shubham, R.1 aJadhav, Vrushali, H.  uhttps://library.ncl.res.in/content/direct-oxidation-alcohols-carboxylic-acids-using-simple-and-economical-pdglu-htc-catalyst01869nas a2200217   4500008004100000022001400041245014600055210006900201260000800270300000700278490000800285520108800293653001201381653001401393653001801407653002301425100002401448700002501472700002501497856012901522       2026                        eng d  a1011-372X00aOne-pot tandem oxidative-wittig olefination of primary alcohols using spent battery material as a heterogeneous catalyst in green solvent GVL0 aOnepot tandem oxidativewittig olefination of primary alcohols us  cJAN  a440 v1563 a<p>
	Extensive global utilization of dry cell batteries resulted in generation of huge amount of battery waste. Up-cycling of spent battery waste material as a heterogeneous catalyst is an emerging area of research. Cathode material from spent dry cell battery (Zinc-carbon) was isolated, acid leached and calcined to obtain BCM-2 which was used as a heterogeneous catalyst for one-pot tandem oxidative-Wittig olefination in &amp; upsih;-valerolactone (GVL) a bio-based green solvent at a temperature of 50 degrees C. Reaction was found to proceed smoothly using an economical catalyst and environment friendly conditions to get olefins in good yield up-to 74%. The catalyst was found to be reusable for four cycles. The reaction was carried out two-steps in one pot using spent battery material as a catalyst in GVL as a solvent under mild reaction conditions and the applicability of catalyst was shown in 13 examples. The catalyst's effectiveness was also assessed in synthesis of (E)-3, 4 `, 5-trimethoxy-trans-stilbene, an intermediate for biologically active Resveratol.</p>
10aOne-pot10aOxidation10aSpent battery10aWittig olefination1 aBankar, Shubham, R.1 aGhadge, Sambhaji, S.1 aJadhav, Vrushali, H.  uhttps://library.ncl.res.in/content/one-pot-tandem-oxidative-wittig-olefination-primary-alcohols-using-spent-battery-material