01427nas a2200229   4500008004100000022001400041245009800055210006900153260008600222300001200308490000700320520056100327653002000888653001800908653002600926653002500952653001500977100002500992700002001017700002801037856013201065       2015                        eng d  a0732-830300aDirect glycosylation of unprotected and unactivated sugars using bismuth nitrate pentahydrate0 aDirect glycosylation of unprotected and unactivated sugars using  a530 WALNUT STREET, STE 850, PHILADELPHIA, PA 19106 USAbTAYLOR & FRANCIS INCcMAY  a196-2050 v343 a<p>Bi(NO3)(3), a low-cost, mild, and environmentally green catalyst, has been successfully utilized for Fischer glycosylation for the synthesis of alkyl/aryl glycopyranosides by reacting unprotected sugars, namely, D-glucose, L-rhamnose, D-galactose, D-arabinose, and N-acetyl-D-glucosamine with various alcohols in good to excellent yields. The glycosides were formed with high alpha-selectivity. Further, an expedient separation of alpha- and beta-glycosides using silver nitrate-impregnated silica gel flash liquid chromatography has been developed.</p>10aBismuth nitrate10acarbohydrates10aFischer glycosylation10aFlash chromatography10aSeparation1 aPolanki, Innaiah, K.1 aKurma, Siva, H.1 aBhattacharya, Asish, K.  uhttps://library.ncl.res.in/content/direct-glycosylation-unprotected-and-unactivated-sugars-using-bismuth-nitrate-pentahydrate-001493nas a2200229   4500008004100000022001400041245011100055210006900166260010600235300001400341490000700355520059600362653002400958653001800982653001301000653002601013653001201039100002801051700002401079700002801103856013201131       2015                        eng d  a0040-403900aSynthesis of naturally occurring (+)-osmundalactone and 4-epi-(+)-osmundalactone from triacetyl-O-D-glucal0 aSynthesis of naturally occurring osmundalactone and 4epiosmundal  aTHE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLANDbPERGAMON-ELSEVIER SCIENCE LTDcMAY  a2783-27860 v563 a<p>An efficient total synthesis of (+)-osmundalactone 1 has been achieved starting from readily available triacetyl-O-D-glucal 6 employing Ferrier rearrangement and Jones oxidation as key steps. Also, synthesis of 4-epi-(+)-osmundalactone 2 was accomplished from the common key intermediate 9. The absolute stereochemistry of (+)-osmundalactone 1 and a precursor of 4-epi-(+)-osmundalactone 2 have been established by single crystal X-ray analysis. The overall yield of compound 1 and 2 from triacetyl-O-D-glucal 6 is 13% and 8%, respectively. (C) 2015 Elsevier Ltd. All rights reserved.</p>10aBioactive molecules10acarbohydrates10aD-glucal10aFerrier rearrangement10aPyrones1 aKotammagari, Tharun, K.1 aGonnade, Rajesh, G.1 aBhattacharya, Asish, K.  uhttps://library.ncl.res.in/content/synthesis-naturally-occurring-osmundalactone-and-4-epi-osmundalactone-triacetyl-o-d-glucal-0