01240nas a2200169   4500008004100000022001400041245008500055210006900140260007100209300001400280490000700294520057800301100002900879700002400908700002000932856011800952       2009                        eng d  a0022-326300aOrthogonal activation of propargyl and n-pentenyl glycosides and 1,2-orthoesters0 aOrthogonal activation of propargyl and npentenyl glycosides and   a1155 16TH ST, NW, WASHINGTON, DC 20036 USAbAMER CHEMICAL SOCcDEC  a9233-92360 v743 a<p>An orthogonal activation strategy with propargyl and n-pentenyl glycosides has been identified. According to this methodology, n-pentenyl glycosides can be selectively activated with NIS/TMSOTf in the presence of either armed or disarmed propargyl O-glycosides. In addition, we report herein that propargyl 1,2-orthoesters can be selectively activated with AuBr(3) in CH(2)Cl(2) at room temperature in the presence of n-pentenyl glycosides. Similarly, pentenyl 1,2-orthoesters can be selectively activated with NIS/Yb(OTf)(3) in the presence of propargyl glycosides.</p>1 aVidadala, Srinivasa, Rao1 aThadke, Shivaji, A.1 aHotha, Srinivas  uhttps://library.ncl.res.in/content/orthogonal-activation-propargyl-and-n-pentenyl-glycosides-and-12-orthoesters-001033nas a2200157   4500008004100000022001400041245007200055210006800127260010600195300001400301490000700315520040500322100002400727700002000751856010400771       2010                        eng d  a0040-403900aGold-catalyzed glycosidations: synthesis of 1,6-anhydro saccharides0 aGoldcatalyzed glycosidations synthesis of 16anhydro saccharides  aTHE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLANDbPERGAMON-ELSEVIER SCIENCE LTDcNOV  a5912-59140 v513 a<p>Various 1,6-anhydro sugars are synthesized utilizing salient features of gold-catalyzed glycosidations. All the reactions occurred under mild conditions in the presence of 7 mol % of AuBr(3) enabling easy synthesis of 1,6-anhydro sugars from corresponding 6-hydroxy propargyl/methyl monosaccharides, disaccharides, and trisaccharides in good yields. (C) 2010 Elsevier Ltd. All rights reserved.</p>1 aThadke, Shivaji, A.1 aHotha, Srinivas  uhttps://library.ncl.res.in/content/gold-catalyzed-glycosidations-synthesis-16-anhydro-saccharides-001739nas a2200253   4500008004100000022001400041245010700055210006900162260009900231300001400330490000800344520081300352653001801165653002101183653001901204653001801223653001801241653000901259100002401268700001901292700002201311700002001333856013201353       2011                        eng d  a0008-621500aGold catalyzed glycosidations for the synthesis of sugar acrylate/acrylamide hybrids and their utility0 aGold catalyzed glycosidations for the synthesis of sugar acrylat  aTHE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLANDbELSEVIER SCI LTDcSEP  a1511-15180 v3463 a<p>Propargyl glyco 1,2-orthoesters were exploited for the efficient synthesis of interesting glycomonomers such as glyco-acrylates and acrylamides using gold catalysts. It was observed that propargyl glyco 1,2-orthoesters with hydroxyethyl acrylates gives very good yield of the corresponding glyco-acrylates in a single step in the presence of catalytic amount of gold(III) catalyst; whereas, gold catalyzed glycosidation reaction on hydroxyethyl acrylamides was found to yield the corresponding acrylamidoyl 1,2-orthoester which was then converted to the corresponding glycol-acrylamide in the presence of catalytic amount of TMSOTf. Synthesized glyco-acrylate/acrylamide monomers are shown to undergo thiolate addition as well as free radical polymerization (C) 2011 Elsevier Ltd. All rights reserved.</p>10acarbohydrates10aGlycoacrylamides10aGlycoacrylates10aGlycopolymers10aglycosylation10aGold1 aThadke, Shivaji, A.1 aKar, Mritunjoy1 aGupta, Sayam, Sen1 aHotha, Srinivas  uhttps://library.ncl.res.in/content/gold-catalyzed-glycosidations-synthesis-sugar-acrylateacrylamide-hybrids-and-their-utility-0