01691nas a2200169   4500008004100000022001400041245012100055210006900176260011000245300001600355490000600371520094400377100002201321700002101343700002501364856013201389       2015                        eng d  a2046-206900aBiomass derived beta-cyclodextrin-SO3H as a solid acid catalyst for esterification of carboxylic acids with alcohols0 aBiomass derived betacyclodextrinSO3H as a solid acid catalyst fo  aTHOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLANDbROYAL SOC CHEMISTRYcJAN  a12981-129860 v53 a<p>A novel beta-cyclodextrin-SO3H carbon based solid acid catalyst was prepared in a convenient and ecofriendly manner and was characterized using FTIR, PXRD, EDAX and NH3TPD to illustrate that the carbon material has been functionalized with -SO3H, -COOH and -OH groups. The catalyst was studied for esterification of various carboxylic acids and alcohols under solvent free conditions and showed excellent catalytic performance and gave good yields of esters in the range 78-99% at 70 degrees C. No solvent was used either for catalyst preparation nor for esterification reaction. The catalyst can be easily recovered by simple filtration and reused for subsequent three runs without any significant impact on yields of products. The main advantage of this methodology is easy and ecofriendly catalyst preparation, easy catalyst separation, practical simplicity, safe reaction conditions, recyclable catalyst and high product yields.</p>1 aThombal, Raju, S.1 aJadhav, Amol, R.1 aJadhav, Vrushali, H.  uhttps://library.ncl.res.in/content/biomass-derived-beta-cyclodextrin-so3h-solid-acid-catalyst-esterification-carboxylic-acids-001207nas a2200229   4500008004100000022001400041245008800055210006900143260010600212300001400318490000700332520037200339653002400711653001500735653001400750653001700764100002100781700002200802700001800824700002500842856011000867       2015                        eng d  a0040-403900aSynthesis of (+/-) debenzoyl analogs of norsampsones as potential anticancer agents0 aSynthesis of debenzoyl analogs of norsampsones as potential anti  aTHE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLANDbPERGAMON-ELSEVIER SCIENCE LTDcSEP  a5235-52370 v563 a<p>Synthesis of (+/-) debenzoyl analogs of norsampsones 1 and 2 is reported starting from commercially available 1,3-cyclohexadione in six steps with overall yields of 37% and 36%, respectively. Compounds 1 and 2 were tested for their anticancer activity and showed moderate anticancer activity against HeLa cell lines. (C) 2015 Elsevier Ltd. All rights reserved.</p>10aAcylphloroglucinols10aAnticancer10aDebenzoyl10aNorsampsones1 aJadhav, Amol, R.1 aThombal, Raju, S.1 aNigam, Preeti1 aJadhav, Vrushali, H.  uhttps://library.ncl.res.in/content/synthesis-debenzoyl-analogs-norsampsones-potential-anticancer-agents-000900nas a2200157   4500008004100000022001400041245005100055210005000106260011000156300001400266490000700280520032700287100002200614700002500636856008100661       2015                        eng d  a1477-052000aTotal synthesis of the natural product EBC-3290 aTotal synthesis of the natural product EBC329  aTHOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLANDbROYAL SOC CHEMISTRYcJUL  a9485-94910 v133 a<p>The first total synthesis of an anti-leukemic diterpene natural product EBC-329 (1) has been accomplished starting from readily available 6,6-dimethyl-3-oxabicyclo[3.1.0] hexane-2,4-dione (7). An efficient and general approach has been reported for the synthesis of EBC-329 in 13 steps with an overall yield of 10%.</p>1 aThombal, Raju, S.1 aJadhav, Vrushali, H.  uhttps://library.ncl.res.in/content/total-synthesis-natural-product-ebc-329-001312nas a2200205   4500008004100000022001400041245016600055210006900221260000900290300001400299490000700313520054600320653001600866653001900882653001900901653001300920100002200933700002500955856012600980       2016                        eng d  a0040-403900aApplication of glucose derived magnetic solid acid for etherification of 5-HMF to 5-EMF, dehydration of sorbitol to isosorbide, and esterification of fatty acids0 aApplication of glucose derived magnetic solid acid for etherific  cSEP   a4398-44000 v573 a<p>In this study, the catalytic activity of Glu-Fe3O4-SO3H was evaluated for three acid catalyzed reactions: etherification of 5-hydroxymethylfurfural (5-HMF) to 5-ethoxymethylfurfural (5-EMF) in ethanol, dehydration of sorbitol to isosorbide, and esterification of fatty acids with good yields and selectivity. Moreover, the catalyst can be easily separated from the reaction with an external magnetic force and reused at least five times without a significant decrease in catalytic activity. (C) 2016 Elsevier Ltd. All rights reserved.</p>10adehydration10aEsterification10aetherification10aMagnetic1 aThombal, Raju, S.1 aJadhav, Vrushali, H.  uhttps://library.ncl.res.in/content/application-glucose-derived-magnetic-solid-acid-etherification-5-hmf-5-emf-dehydration01496nas a2200217   4500008004100000022001400041245007700055210006900132260008600201300001000287490000700297520071900304653001701023653002201040653001801062653001601080653003001096100002201126700002501148856010501173       2016                        eng d  a0732-830300aSulfonated graphene oxide as highly efficient catalyst for glycosylation0 aSulfonated graphene oxide as highly efficient catalyst for glyco  a530 WALNUT STREET, STE 850, PHILADELPHIA, PA 19106 USAbTAYLOR & FRANCIS INCcJAN  a57-680 v353 a<p>Heterogeneous sulfonated graphene oxide for the first time has been used as a green and efficient catalyst for atom-economic glycosylation of unprotected, unactivated glycosyl donors or 2,3,4,6-tetra-O-acetylglycosyltrichloroacetimidate with various acceptors basically in the absence of solvent. The unprotected, unactivated glycosyl donors afforded mixtures of alpha- and beta-glycosides, while the 2,3,4,6-tetra-O-acetylglycosyltrichloroacetimidate afforded beta-glycosylated products with high yields and selectivity. The main advantages of this methodology are easy catalyst preparation, no need for dry reagents and reaction conditions, easy catalyst separation and recycling, and high product yields.</p>10aglycol donor10aglycosyl acceptor10aglycosylation10areusability10aSulfonated graphene oxide1 aThombal, Raju, S.1 aJadhav, Vrushali, H.  uhttps://library.ncl.res.in/content/sulfonated-graphene-oxide-highly-efficient-catalyst-glycosylation