title: Stereo- and regioselective direct multi-deuterium-labeling methods for sugars.
abstract: Deuterium-labeled sugars can be utilized as powerful tools for the architectural analyses of high-sugar-containing molecules represented by the nucleic acids and glycoproteins, and chiral building blocks for the syntheses of new drug candidates (heavy drugs) due to their potential characteristics, such as simplifying the (1)H NMR spectra and the stability of C-D bonds compared with C-H bonds. We have established a direct and efficient synthetic method of deuterated sugars from non-labeled sugars by using the heterogeneous Ru/C-catalyzed H-D exchange reaction in D(2)O under a hydrogen atmosphere with perfect chemo- and stereoselectivities. The direct H-D exchange reaction can selectively proceed on carbons adjacent to the free hydroxyl groups, and the deuterium labeling of various pyranosides (such as glucose and disaccharides), as well as furanosides, represented by ribose and deoxyribose was realized. Furthermore, the desired number of deuterium atoms can be freely incorporated into selected positions by the site-selective protection of the hydroxyl groups using acetal-type protective groups because the deuterium exchange reaction never proceeds on positions adjacent to the protected hydroxyl groups.
authors.affiliation: Laboratory of Organic Chemistry, Gifu Pharmaceutical University, 1-25-4 Daigakunishi, Gifu 501-1196, Japan.
authors.forename: Yoshinari
authors.initials: Y
authors.lastname: Sawama
authors.forename: Yuki
authors.initials: Y
authors.lastname: Yabe
authors.forename: Hiroki
authors.initials: H
authors.lastname: Iwata
authors.forename: Yuta
authors.initials: Y
authors.lastname: Fujiwara
authors.forename: Yasunari
authors.initials: Y
authors.lastname: Monguchi
authors.forename: Hironao
authors.initials: H
authors.lastname: Sajiki
mesh_terms: D002241:Carbohydrates / Q000737:chemistry*; D002384:Catalysis; D003903:Deuterium / Q000737:chemistry*; D005947:Glucose / Q000737:chemistry*; D006860:Hydrogen Bonding; D009682:Magnetic Resonance Spectroscopy; D012428:Ruthenium / Q000737:chemistry; D013237:Stereoisomerism
chemical_list: D002241:Carbohydrates; D012428:Ruthenium; D003903:Deuterium; D005947:Glucose