Találati lista | Tudóstér

001-es BibID:	KLTEbibl002893
Első szerző:	Praly, Jean-Pierre
Cím:	Radical-mediated halogenations of anomerically N-substituted glucopyranosyl derivatives / J. P. Praly, l. Somsák, S. H. Mahmoud, Z. El. Kharraf, G. Descotes, I. Farkas
Dátum:	1992
ISSN:	0732-8303
Megjegyzések:	Reactions of acetylated N-aryl-D-glucosylamines with N-bromosuccinimide-benzoyl peroxide or with sulfuryl chloride-azoisobutyronitrile gave aromatic halo derivatives. The corresponding N-acetylated compounds were mostly inert towards halogenation. Bromination of acetylated cellobiosylpiperidine resulted in the formation of acetobromocellobiose, while the acetylated 2,6,8-trichloro-9-(β-D-glucopyranosyl)-purine was transformed into its 5'-bromo derivative. In contrast, peracetylated glucopyranosyl isothiocyanate or azides, when treated by N-bromosuccinimide under free-radical conditions, essentially undergo an initial homolysis of the anomeric C-H bond which is faster for β-anomers. This initiates a new, simple and efficient free-radical transformation of such sugar azides into an unprecedented brornimino lactone (92% isolated yield).
Tárgyszavak:	Természettudományok Kémiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
Megjelenés:	Journal Of Carbohydrate Chemistry 11 : 3 (1992), p. 201-216. -
További szerzők:	Somsák László (1954-) (vegyész) Mahmoud, S. H. Kharraf, Z. El. Descotes, Gérard Farkas István
Internet cím:	DOI
Borító:
Saját polcon: