11345nas a2200157 45000080041000002450092000412100069001332600008002023000011002104900006002215201076200227100002410989700002611013700002511039856012311064 2022 eng d00aCobalt-immobilized carbon-based nano-catalyst for Csingle bondN cross coupling reaction0 aCobaltimmobilized carbonbased nanocatalyst for Csingle bondN cro cJAN a1006820 v43 a

Csingle bondcross coupling reaction is very important in synthesis of pharmaceuticals, natural productsagrochemicals, fine chemicals and functional materials. Traditionally, palladium or copper metals are used for Csingle bondN coupling reaction. As palladium is expensive, we developed cobalt immobilized carbon-based nano-catalyst Co@CC for Csingle bondN coupling. In this work, we synthesized non-noble metal-based Co@CC nano-catalyst by carbonization of glucose, it’s functionalization followed by immobilization of cobalt on the surface of the catalyst. The catalyst was well characterized. The Csingle bondN cross coupling reaction of various aryl halides & amines using Co@CC nano-catalyst was optimized for solvent, reaction temperature & catalyst concentration conditions. The catalyst showed high catalytic activity for Csingle bondN coupling of various aryl halides & amines to form aryl amines in good to excellent yield up to 91 % in sulfolane as a solvent at 150 °C. The catalyst showed recyclability up to 5 times. The method developed for Csingle bondN coupling reaction was noble metal free, ligand free, recyclable, sustainable, economical & environmentally friendly.

1 aBankar, Shubham, R.1 aKirdant, Swapnali, P.1 aJadhav, Vrushali, H. uhttps://library.ncl.res.in/content/cobalt-immobilized-carbon-based-nano-catalyst-csingle-bondn-cross-coupling-reaction01643nas a2200169 4500008004100000022001400041245019800055210006900253260000800322300001600330490000700346520091100353100003001264700002601294700002501320856012801345 2022 eng d a1144-054600aMetal-free approach towards efficient synthesis of FDCA using a p-toluene sulfonic acid (p-TSA)-derived heterogeneous solid acid catalyst and oxone over two steps from HMF, fructose and glucose0 aMetalfree approach towards efficient synthesis of FDCA using a p cMAY a10272-102790 v463 a

In this work, a metal-free approach towards the synthesis of 2,5-furandicarboxylic acid (FDCA) from 5-hydroxymethylfurfural (HMF), fructose and glucose is reported over two steps using a p-toluene sulfonic acid (p-TSA)-derived heterogeneous solid acid catalyst (p-TSA-POM) in the first step and oxone as an oxidant in the second step. HMF, fructose and glucose were converted to 2,5-diformylfuran (DFF) using the p-TSA-POM catalyst followed by oxidation of DFF to FDCA using oxone. To the best of our knowledge, this is the first metal-free approach for the synthesis of FDCA directly from glucose. DFF was obtained from HMF in 91% yield, whereas it was obtained in 85% and 61% yields from fructose & glucose, respectively. DFF was further converted to FDCA using oxone as an oxidant. FDCA was obtained in an overall yield of 84%, 78% and 56% from HMF, fructose & glucose, respectively.

1 aTamboli, Asma, T. Biradar1 aKirdant, Swapnali, P.1 aJadhav, Vrushali, H. uhttps://library.ncl.res.in/content/metal-free-approach-towards-efficient-synthesis-fdca-using-p-toluene-sulfonic-acid-p-tsa01788nas a2200229 4500008004100000022001400041245010800055210006900163260000800232300001500240490000800255520098800263653001401251653001201265653001401277653001501291653004801306100002601354700003001380700002501410856012301435 2022 eng d a0018-019X00aRecent developments in the applications of biomass-derived sulfonated carbonaceous solid acid catalysts0 aRecent developments in the applications of biomassderived sulfon cAUG ae2022000320 v1053 a

Recently, carbon-based materials are gaining a lot of attraction. It is considered as an emerging area of research and has gained significant importance as an efficient catalyst/material in various fields. Biomass is abundantly available, cheap and a renewable carbon resource. Sulfonated carbonaceous solid acid catalyst can be derived by sulfonation of various sources of biomass such as sugars, lignin, fruit waste, agro-waste, bio-char, etc. Sulfonated carbonaceous solid acid catalysts can be used as a substitute to liquid acids. These catalysts possess a stable carbon skeleton and are insoluble in almost all organic solvents as well as under acidic/basic conditions. This review covers details about biomass-derived sulfonated carbonaceous solid acid catalysts and its catalytic activities in many important transformations such as hydrolysis of cellulose, synthesis of biodiesel, synthesis of various important chemicals and for various organic transformations.

10aBiodiesel10aBiomass10acellulose10aHydrolysis10asulfonated carbonaceous solid acid catalyst1 aKirdant, Swapnali, P.1 aTamboli, Asma, T. Biradar1 aJadhav, Vrushali, H. uhttps://library.ncl.res.in/content/recent-developments-applications-biomass-derived-sulfonated-carbonaceous-solid-acid02698nas 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

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.

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-catalyst02128nas 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-glucose