Publication

Syntheses of beta-C(1 -> 3)-Glucopyranosides of 2-and 4-deoxy-D-hexoses

Pierre Vogel
2003
Journal Articles

Abstract

The Oshima-Nozaki (Et2AlI) condensation of isolevoglucosenone (4) with 2,6-anhydro-3,4,5,7-tetra-O-benzyl-D-glycero-D-gulo-heptose (5) gave an enone 6 that was converted with high stereoselectivity to 3-C-[(IR)-2,6-anhydro-D-glycero-D-gulo-heptitol-1-C-yl]-2,3-dideoxy-D-ar abino-hexose (1; 1: 1 mixture of alpha- and beta-D-pyranose), and to 3-C-[(1R)-2,6-anhydro-D-glycero-D-gulo-heptitol-1-C-yl]-2,3-dideoxy-D-ly xo-hexose (2; 2.7:1.4:1.0:1.4 mixture of alpha-D-furanose, beta-D-furanose, alpha-D-pyranose, and beta-D-pyranose). The Oshima-Nozaki (Et2AlI) condensation of levoglucosenone (17) with aldehyde 5 gave an enone 18 that was converted with high stereoselectivity to 3-C-[(1R)-2,6-anhydro-D-glycero-D-gulo-heptitol-1-C-yl]-3,4-dideoxy-alph a-D-arabino-hexopyranose (3; single anomer).

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https://infoscience.epfl.ch/entities/publication/54759987-e69e-428d-8a6d-2cc0d0d0cb34

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Pierre Vogel
2003
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/54759987-e69e-428d-8a6d-2cc0d0d0cb34

About this result

Related concepts (14)

Galactose

Galactose (gəˈlæktoʊs, galacto- + -ose, "milk sugar"), sometimes abbreviated Gal, is a monosaccharide sugar that is about as sweet as glucose, and about 65% as sweet as sucrose. It is an aldohexose and a C-4 epimer of glucose. A galactose molecule linked with a glucose molecule forms a lactose molecule. Galactan is a polymeric form of galactose found in hemicellulose, and forming the core of the galactans, a class of natural polymeric carbohydrates.

Glucose

Glucose is a sugar with the molecular formula . Glucose is overall the most abundant monosaccharide, a subcategory of carbohydrates. Glucose is mainly made by plants and most algae during photosynthesis from water and carbon dioxide, using energy from sunlight, where it is used to make cellulose in cell walls, the most abundant carbohydrate in the world. In energy metabolism, glucose is the most important source of energy in all organisms. Glucose for metabolism is stored as a polymer, in plants mainly as starch and amylopectin, and in animals as glycogen.

Ribose

Ribose is a simple sugar and carbohydrate with molecular formula C5H10O5 and the linear-form composition H−(C=O)−(CHOH)4−H. The naturally-occurring form, -ribose, is a component of the ribonucleotides from which RNA is built, and so this compound is necessary for coding, decoding, regulation and expression of genes. It has a structural analog, deoxyribose, which is a similarly essential component of DNA. -ribose is an unnatural sugar that was first prepared by Emil Fischer and Oscar Piloty in 1891.

Related publications (1)

Syntheses of beta-C(1 -> 3)-Glucopyranosides of 2-and 4-deoxy-D-hexoses

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