全部文献期刊会议图书|学者科研项目
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作者:... Werner Reutter , Richard R Schmidt , Stephan Hinderlich
来源:[J].FEBS Letters(IF 3.582), 2002, Vol.521 (1), pp.127-132
摘要:Abstract(#br)Sialic acids comprise a family of terminal sugars essential for a variety of biological recognition systems. UDP- N -acetylglucosamine 2-epimerase catalyzes the first step of their biosynthesis. Periodate-oxidized UDP- N -acetylglucosamine, namely 2′,3′-dialdehy...
作者:Adel A.-H Abdel-Rahman , El Sayed H El Ashry , Richard R Schmidt
来源:[J].Carbohydrate Research(IF 2.044), 1999, Vol.315 (1), pp.106-116
摘要:Abstract(#br)The C -glucosyl aldehyde, 2- C -(2,3,4,6-tetra- O -acetyl-α- d -glucopyranosyl)ethanal was prepared from the C -glucopyranosyl propene precursor by ozonolysis. Reductive amination of the C -glucosyl aldehyde and subsequent deprotection gave 1-anilino-2- C -(α- d...
作者:... El-Sayed I Ibrahim , El Sayed H El Ashry , Richard R Schmidt
来源:[J].Carbohydrate Research(IF 2.044), 2001, Vol.331 (2), pp.129-142
摘要:Abstract(#br)tert -Butyldimethylsilyl 3,6-di- O -benzyl-2-deoxy-2-dimethylmaleimido-β- d -glucopyranoside was readily transformed into the disaccharide glycosyl donor, 3,4,6-tri- O -acetyl-2-deoxy-2-dimethylmaleimido-β- d -glucopyranosyl-(1→4)-3,6-di- O -benzyl-2-deoxy-2-dim...
作者:Andreas Stadelmaier , Richard R Schmidt
来源:[J].Carbohydrate Research(IF 2.044), 2003, Vol.338 (23), pp.2557-2569
摘要:Abstract(#br)Two strategies towards the synthesis of phosphatidylinositol mannosides (PIMs) were elaborated which permit selective access to the O -1-, O -2-, and the O -6 position of the myo -inositol residue. Starting materials are 1,2:5,6- and 1,2:4,5-di- O -cyclohexylide...
作者:Gerd Hummel , Richard R Schmidt
来源:[J].Tetrahedron Letters(IF 2.397), 1997, Vol.38 (7), pp.1173-1176
摘要:Abstract(#br)Readily available fucosyl α(1–3)azidoglucose disaccharide 6 is transformed with galactosyl donors 7 and 8 into Lewis X trisaccharide building blocks 9 and 12 , respectively, in high yield. Their suitability for the construction of the lactoneo -series glycosphin...
作者:Ahmed I Khodair , Richard R Schmidt
来源:[J].Carbohydrate Research(IF 2.044), 2002, Vol.337 (21), pp.1967-1978
摘要:Abstract(#br)A general strategy towards the synthesis of C -glycosyl compounds of N -acetylneuraminic acid (Neu5Ac) has been developed and successfully applied to the synthesis of C -methyl and C -phenyl derivatives. The key strategic elements are (i) chain extension of a d -gluc...
作者:Thomas Müller , Richard R Schmidt
来源:[J].Tetrahedron Letters(IF 2.397), 1997, Vol.38 (31), pp.5473-5476
摘要:Abstract(#br)The synthesis of the target molecule 1 is based on thexyldimethylsilyl 4-O-acetyl-2,3,6-trideoxy-3-C-methylene- β -D- erythro -hexopyranoside ( 7 ) which is readily obtained via two different routes from tri-O-acetyl-D-glucal ( 2 ). Replacement of the anomeric s...
作者:... El-Sayed I Ibrahim , El-Sayed H El Ashry , Richard R Schmidt
来源:[J].Carbohydrate Research(IF 2.044), 1999, Vol.316 (1), pp.121-132
摘要:Abstract(#br)The disaccharide donor O -[2,3,4,6-tetra- O -acetyl-β- d -galactopyranosyl)-(1→4)-3,6-di- O -benzyl-2-deoxy-2-dimethylmaleimido-α,β- d -glucopyranosyl] trichloroacetimidate ( 7 ) was prepared by reacting O -(2,3,4,6-tetra- O -acetyl-α- d -galactopyranosyl) ...
作者:Christian Gege , Stefan Oscarson , Richard R Schmidt
来源:[J].Tetrahedron Letters(IF 2.397), 2001, Vol.42 (3), pp.377-380
摘要:Abstract(#br)The pyrene and nitrobenzoxadiazole (NBD) labeled derivatives of the natural sialyl Lewis X glycosphingolipid 1 were chemically synthesized as targets for investigating microdomain formation in membranes. The fluorescent analogs 2 and 3 were prepared by replacing the ...
作者:Asish K Bhattacharya , Florian Stolz , Richard R Schmidt
来源:[J].Tetrahedron Letters(IF 2.397), 2001, Vol.42 (32), pp.5393-5395
摘要:Abstract(#br)A novel class of glucosyltransferase inhibitors has been designed and synthesised. The designed inhibitors 1 – 4 provide conformational mimicry of the transition-state in glucosyltransfer reactions. The key synthetic steps involve a Michaelis–Arbuzov reaction fo...

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