02646nas a2200289   4500008004100000022001400041245012500055210006900180260000800249300001600257490000700273520167000280653001201950653002501962653001401987653002702001653002102028653001902049100002202068700002602090700002202116700001802138700002902156700002402185700001902209856012802228       2021                        eng d  a2155-543500aSupported MoOx and WOx solid acids for biomass valorization: interplay of coordination chemistry, acidity, and catalysis0 aSupported MoOx and WOx solid acids for biomass valorization inte  cNOV  a13603-136480 v113 aSupported molybdenum oxide (MoOx) and tungsten oxide (WOx) materials are a vital class of solid acid catalysts for the chemical industry because of their nontoxic nature, strong acidity, remarkable stability in water, hydrogen, and oxygen atmospheres, and excellent reusability performance. These fascinating solid acids play a pivotal role in developing sustainable catalytic routes for renewable biomass processing to produce value-added fuels, chemicals, and platform molecules. The coordination chemistry of MoOx and WOx on the support materials (oxides, carbons, or zeolites) controls their acidic strength, active site accessibility, and catalytic activity. Hence, significant efforts have been made toward optimizing the conditions used for catalyst synthesis and biomass processing to tune the coordination chemistry of MoOx and WOx with the substrate molecules and, thus, their acid-activity/selectivity performance. This Review provides a comprehensive overview of supported MoOx and WOx solid acids for biomass valorization. The importance of the biomass and the role of solid acids for biomass valorization were emphasized, followed by a brief discussion of supported MoOx and WO(x )solid acids. Afterward, the interplay of coordination chemistry, acidic strength, and catalytic activity of supported MoOx and WOx solid acids was discussed. Finally, their catalytic applications for the valorization of several biomass substrates and their derivatives were summarized. This Review will provide valuable insights for developing advanced supported WOx and MoOx solid acids for catalytic biomass valorization and other challenging acid-catalyzed processes.10aAcidity10abiomass valorization10acatalysis10aCoordination chemistry10amolybdenum oxide10atungsten oxide1 aSudarsanam, Putla1 aGupta, Navneet, Kumar1 aMallesham, Baithy1 aSingh, Nittan1 aKalbande, Pavan, Narayan1 aReddy, Benjaram, M.1 aSels, Bert, F.  uhttps://library.ncl.res.in/content/supported-moox-and-wox-solid-acids-biomass-valorization-interplay-coordination-chemistry02034nas a2200241   4500008004100000022001400041245014700055210006900202260000800271300001400279490000700293520120200300653001401502653001401516653001301530653001501543653002401558100002401582700002401606700001801630700002201648856012201670       2022                        eng d  a2168-048500aEfficient synthesis of 5-(hydroxymethyl)furfural esters from polymeric carbohydrates using 5-(chloromethyl)furfural as a reactive intermediate0 aEfficient synthesis of 5hydroxymethylfurfural esters from polyme  cMAY  a5803-58090 v103 a<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>
10acatalysis10acellulose10afuranics10aHMF-esters10arenewable synthesis1 aBhat, Navya, Subray1 aHegde, Shobhita, L.1 aDutta, Saikat1 aSudarsanam, Putla  uhttps://library.ncl.res.in/content/efficient-synthesis-5-hydroxymethylfurfural-esters-polymeric-carbohydrates-using-5