02160nas a2200169 4500008004100000022001400041245014800055210006900203260000800272300001600280490000700296520147700303100002401780700002501804700002501829856013601854 2023 eng d a1144-054600aGreen, practical & scalable approach towards the synthesis of valuable α-keto amides using a metal-free catalyst under solvent-free conditions0 aGreen practical scalable approach towards the synthesis of valua cOCT a19679-196870 v473 a

alpha-Ketoamides are very important motifs as they are present in many natural products, drugs & biologically important molecules. We synthesized a very simple, cheap, eco-friendly & reusable glucose-based carbonaceous material (GCM), which showed high performance as a catalyst in the oxidative cross-dehydrogenative coupling (CDC) reaction of alpha-ketoaldehydes with amines for the synthesis of alpha-ketoamides. The GCM catalyst was also very efficient for one-pot two-step synthesis of alpha-ketoamides from alpha-ketoalcohols as well. The GCM catalyst was able to catalyze alcohol oxidation in alpha-ketoalcohols followed by CDC reaction with amines to form alpha-ketoalcohols. The reactions were found to proceed smoothly at a low temperature of 50 degrees C using a green & economical metal-free catalyst under base-free, ligand-free & solvent-free reaction conditions to get the corresponding alpha-ketoamides in good to excellent yields. The results demonstrated that the GCM catalyst showed acidic as well as superior oxidising catalytic activity due to the presence of a carboxylic acid (-COOH) and hydroxyl (-OH)-enriched carbonaceous framework, which enabled the synthesis of important alpha-ketoamide motifs. The applicability of the catalyst was also evaluated for the synthesis of an anti-HIV agent drug molecule. Greener, cheaper & eco-friendly GCM catalyst as well as catalytic process for synthesis of alpha-Keto Amides.

1 aBankar, Shubham, R.1 aGhadge, Sambhaji, S.1 aJadhav, Vrushali, H. uhttps://library.ncl.res.in/content/green-practical-scalable-approach-towards-synthesis-valuable-%CE%B1-keto-amides-using-metal-free02072nas a2200145 4500008004100000245015300041210006900194260000800263490000600271520144600277100002501723700002401748700002501772856012901797 2024 eng d00aSelective oxidation of biomass derived 5-hydroxymethylfurfural (HMF) to 2,5-diformylfuran (DFF) over spent dry cell battery cathode material (BCM-2)0 aSelective oxidation of biomass derived 5hydroxymethylfurfural HM cNOV0 v23 a

Widespread use of batteries across the globe generates a huge amount of waste. This work is the first to report spent dry cell (Zn-Carbon) battery cathode material (BCM-2) as a heterogeneous catalyst for selective synthesis of fine chemical 2,5-diformylfuran (DFF). Cathode material was easily separated from spent batteries, and acid leached followed by calcination to obtain black powder that was denoted as BCM-2. The catalyst was characterized using various techniques such as P-XRD, EDAX, SEM, HR-TEM, TGA, XPS, and BET analysis. Superior catalytic activity was shown by the catalyst for selective formation of DFF using molecular O2 as a sole oxidant. The catalyst was found to give excellent HMF conversion of 97% with 98% high selectivity of DFF. The BCM-2 catalyst was easily recycled and reused without any significant loss in its catalytic activity. This is one of the best examples for a sustainable, cost-effective, and highly efficient catalytic system for the synthesis of the value-added chemical DFF.

1 aGhadge, Sambhaji, S.1 aBankar, Shubham, R.1 aJadhav, Vrushali, H. uhttps://library.ncl.res.in/content/selective-oxidation-biomass-derived-5-hydroxymethylfurfural-hmf-25-diformylfuran-dff-over02128nas a2200169 4500008004100000022001400041245010600055210007000161260000900231300001400240490000700254520149100261100002601752700002501778700002501803856013001828 2025 eng d a0887-062400aGraphitic-C3N4/γ-Al2O3 composite catalyst for synthesis of 5-(Hydroxymethyl) furfural from d-Glucose0 aGraphiticC3N4γAl2O3 composite catalyst for synthesis of 5Hydroxy cAPR  a8529-85390 v393 a

Currently, the synthesis of 5-hydroxymethylfurfural (5-HMF), with high yields and selectivity from different renewable sources, is an important focus in the biomass conversion area. In the present study, a g-C3N4/gamma-Al2O3(1:1) composite catalyst was prepared using graphitic carbon nitride (g-C3N4) and acidic gamma-alumina (gamma-Al2O3), which was evaluated for its catalytic activity in converting sugars, mainly glucose, to 5-HMF. In the g-C3N4/gamma-Al2O3(1:1) catalyst, N-containing groups on g-C3N4 provided basicity and gamma-Al2O3 provided Lewis acidity to the catalyst. The g-C3N4/gamma-Al2O3(1:1) composite catalyst showed superior activity for 5-HMF synthesis compared to gamma-Al2O3 and g-C3N4 alone. The increased acidic and basic properties of the g-C3N4/gamma-Al2O3(1:1) catalyst significantly influenced both glucose-to-fructose isomerization and dehydration of fructose to HMF by increasing the yield of 5-HMF. In addition, the solvent DMSO:water also played an important role in the one-pot conversion of glucose to HMF by minimizing side reactions, which significantly improved the 5-HMF yield. The reaction was optimized for various solvents, temperatures, and catalyst concentrations to get a maximum yield of 91% from glucose with >99% selectivity of crude 5-HMF. Other sugars like fructose, sucrose, and lactose also provided good yields of 5-HMF. The g-C3N4/gamma-Al2O3(1:1) catalyst was stable and was effectively reused for up to four cycles.

1 aKirdant, Swapnali, P.1 aGhadge, Sambhaji, S.1 aJadhav, Vrushali, H. uhttps://library.ncl.res.in/content/graphitic-c3n4%CE%B3-al2o3-composite-catalyst-synthesis-5-hydroxymethyl-furfural-d-glucose01869nas 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

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 & 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.

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