01131nas a2200169   4500008004100000022001400041245011800055210006900173260010600242300001400348490000700362520040500369100002000774700002900794700002000823856011800843       2007                        eng d  a0040-403900aSynthesis of C-2 methylene glycosides from C-2 propargyloxymethyl glycals exploiting the alkynophilicity of AuCl30 aSynthesis of C2 methylene glycosides from C2 propargyloxymethyl   aTHE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLANDbPERGAMON-ELSEVIER SCIENCE LTDcDEC  a8960-89620 v483 a<p>C-2 Methylene glycosides were synthesized from C-2 propargyloxymethyl glycals in a stereoselective manner using a catalytic quantity of AuCl3. The Au-catalyzed reaction was explored using various aglycones. The current protocol enables the preparation of C-2 methylene glycosides, tolerates diverse functional groups and is fast, catalytic and mild. (c) 2007 Elsevier Ltd. All rights reserved.</p>1 aKashyap, Sudhir1 aVidadala, Srinivasa, Rao1 aHotha, Srinivas  uhttps://library.ncl.res.in/content/synthesis-c-2-methylene-glycosides-c-2-propargyloxymethyl-glycals-exploiting-001119nas a2200145   4500008004100000022001400041245012400055210006900179260011000248300001400358520042300372100002900795700002000824856012900844       2009                        eng d  a1359-734500aMethyl glycosides are identified as glycosyl donors for the synthesis of glycosides, disaccharides and oligosaccharides0 aMethyl glycosides are identified as glycosyl donors for the synt  aTHOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLANDbROYAL SOC CHEMISTRYcMAR  a2505-25073 a<p>Stable methyl glycosides are identified as glycosyl donors in the presence of AuBr(3) in acetonitrile; a panel of aglycones comprising aliphatic, alicyclic, steroidal and sugar alcohols are examined successfully for the glycosylation reaction and methyl glycosides of di- and tri-saccharides are converted to corresponding tri- and tetra-saccharides exploiting salient features of our novel activation protocol.</p>1 aVidadala, Srinivasa, Rao1 aHotha, Srinivas  uhttps://library.ncl.res.in/content/methyl-glycosides-are-identified-glycosyl-donors-synthesis-glycosides-disaccharides-and-001240nas 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-001028nas a2200181   4500008004100000022001400041245006200055210006100117260011000178300001400288490000700302520034600309100002900655700002600684700002100710700002000731856009500751       2011                        eng d  a1359-734500aPropargyl/methyl furanosides as potential glycosyl donors0 aPropargylmethyl furanosides as potential glycosyl donors  aTHOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLANDbROYAL SOC CHEMISTRYcAUG  a9906-99080 v473 a<p>Transfuranosylations are not well studied though many similar studies exist for transpyranosylation; herein, we report that propargyl/methyl D-ribf- and D-lyxf- give only 1,2-trans glycosides whereas D-araf- and D-xylf- result in a mixture of 1,2-trans and 1,2-cis glycosides; observed facts are rationalised by computational studies.</p>1 aVidadala, Srinivasa, Rao1 aGayatri, Gaddamannugu1 aSastry, Narahari1 aHotha, Srinivas  uhttps://library.ncl.res.in/content/propargylmethyl-furanosides-potential-glycosyl-donors-0