Results 221 to 230 of about 436,301 (266)

Protecting group migrations in carbohydrate chemistry

Carbohydrate Research, 2020
Protecting groups are valuable in chemo- and regioselective synthetic manipulations. In particular, they are indispensable in carbohydrate chemistry. Although a wide array of protecting groups are available at the disposal of carbohydrate chemists, their stability and orthogonality make the choice of protecting groups challenging.
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The Thiocarbonyl Group in Carbohydrate Chemistry

Sulfur reports, 1996
Abstract Recent developments in the chemistry of thiocarbonyl carbohydrate derivatives are reviewed in this article. Emphasis has been placed on the interactions between the various functional groups that may coexist in a given molecule as well as the synthetic, biological, and technical applications of this family of compounds.
José Manuel García Fernandez, Carmen Ortiz Mellet   +1 more
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Protein–carbohydrate interaction. Part XIV. Carbohydrates containing groups for the alkylation of proteins

J. Chem. Soc. C, 1968
Carbohydrates containing isothiocyanate and bromoacetate groups in various positions have been prepared. A number of uses for such protein-alkylating agents is discussed.
D H, Buss, I J, Goldstein
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Structure of the streptococcal groups A, A-variant and C carbohydrates

Immunochemistry, 1978
Abstract Structural studies on the Groups A, A-variant and C carbohydrates of β-hemolytic streptococci indicate that they have in common a polyrhamnose core. The A-variant carbohydrate consists solely of this polyrhamnose structure which has been shown to contain alternating α1, 2-and α1, 3-linked rhamnose units.
J E, Coligan, T J, Kindt, R M, Krause
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Carbohydrate and end group analyses of ovine FSH

Biochemical and Biophysical Research Communications, 1971
Abstract The carbohydrate content and terminal amino acids of a highly purified preparation of ovine follicle stimulating hormone (FSH) were determined. The purified FSH contained high amounts of hexosamine and sialic acid. The C-terminal amino acids were serine and glutamic acid while serine and phenylalanine were found at the N-termini.
H J, Grimek, L C, Nuti, W H, McShan
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Selective Cleavage of Methoxy Protecting Groups in Carbohydrates

The Journal of Organic Chemistry, 2006
The selective cleavage of methoxy protecting groups next to hydroxy groups is achieved using a radical hydrogen abstraction reaction as the key step. Under the reaction conditions, the hydroxy group generates an alkoxyl radical that reacts with the sterically accessible adjacent methoxy group, which is transformed into an acetal.
Alicia, Boto, Dácil, Hernández, Rosendo, Hernández, Ernesto, Suárez   +3 more
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Biofunctionalizing nanofibers with carbohydrate blood group antigens

Biopolymers, 2016
AbstractA rapid and simple method of biofunctionalising nylon, cellulose acetate, and polyvinyl butyral electrospun nanofibers with blood group glycans was achieved by preparing function‐spacer‐lipid constructs and simply contacting them to fibers with a piezo inkjet printer.
Katie, Barr, Bhuvaneswari, Kannan, Elena, Korchagina, Inna, Popova, Ivan, Ryzhov, Stephen, Henry, Nicolai, Bovin   +6 more
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Relative Reactivities of Hydroxyl Groups of Carbohydrates

1953
Publisher Summary This chapter discusses the relative reactivities of hydroxyl groups in carbohydrates, which is of considerable value in the field of syntheses. The selective reactivity of hydroxyl groups of carbohydrates in many instances seems to be a consequence of spatial arrangement of the groups. This is especially indicated in those reactions,
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Regulation of expression of carbohydrate blood group antigens

Biochimie, 1988
The carbohydrate antigens associated with the human ABO and Lewis blood group systems are excellent models for the study of the genetic regulation of glycoconjugate biosynthesis because their expression on erythrocytes and in saliva has been thoroughly investigated in terms of classical genetics and the chemical structures and pathways for the ...
W M, Watkins, P, Greenwell, A D, Yates, P H, Johnson   +3 more
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Protecting Groups in Carbohydrate Chemistry

Journal of Chemical Education, 1997
The most important protecting groups in carbohydrate chemistry are reviewed. The paper is aimed at those beginning to specialize in synthetic carbohydrate chemistry and at teachers with other speci...
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