𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Nouveaux exemples de radicaux libres stables de dérivés hétérocycliques de sucres. Communication préliminaire

✍ Scribed by Jean M. J. Tronchet; Joëlle Ojha-Poncet; Eva Winter-Mihaly; Boris Kohler; Michel Geoffroy

Publisher
John Wiley and Sons
Year
1977
Tongue
German
Weight
214 KB
Volume
60
Category
Article
ISSN
0018-019X

No coin nor oath required. For personal study only.

✦ Synopsis

Some more examples of stable free radicals of carbohydrate heterocyclic derivatives

2‐Glycosyl‐4,4,5,5‐tetramethylimidazoline‐ 3‐oxide‐1‐oxyls and 2‐glycosyl‐4,4,5,5‐tetramethylimidazoline 1‐oxyls have been prepared in nine carbohydrate series, which proves the generality of the method. The hyperfine coupling constant between the free electron and the α‐proton of the glycosyl group is never very large (0‐2.3 G) but a correlation between its value and the structure of the aglycone has been noted. Free radicals of that type, stable in aqueous solutions, are potentially interesting for biological studies.

📜 SIMILAR VOLUMES

Dérivés C-glycosyliques XXIII. Radicaux
Dérivés C-glycosyliques XXIII. Radicaux libres stables dérivés de sucre Communication préliminaire
✍ Jean M. J. Tronchet; Eva Mihaly; Michel Geoffroy 📂 Article 📅 1975 🏛 John Wiley and Sons 🌐 German ⚖ 276 KB

## Abstract Treated with 2,3‐dimethyl‐2,3‐bis‐(hydroxylamino)‐butane, aldehydo‐dialdofuranoses (**1**) gave a mixture of two compounds: a 1,3‐dihydroxyimidazolidine (**2**) and a 1‐hydroxyimidazoline (**3**). Oxidation (PbO~2~) of compounds **3** gave stable free radicals having the structure of 2‐

Dérivés de désoxy-hydroxylamino-sucres e
Dérivés de désoxy-hydroxylamino-sucres et radicaux libres diglycosylnitroxydes correspondants. Communication préliminaire
✍ Jean M. J. Tronchet; Eva Winter-Mihaly; Ford Habashi; Dominique Schwarzenbach; U 📂 Article 📅 1981 🏛 John Wiley and Sons 🌐 German ⚖ 340 KB

**Deoxy‐hydroxylamino‐sugar Derivatives and Corresponding Diglycosylnitroxides Radicals** A number of sugar aldonitrones, including __C,N__‐diglycosylnitrones, and ketonitrones have been treated with __Grignard__ reagents or cyanide anion leading to the corresponding deoxy‐hydroxylamino‐sugars. On

Radicaux libres dérivés de sucres. V. Dé
Radicaux libres dérivés de sucres. V. Dérivés d'osamines N-hydroxylées et composés voisins Communication préliminaire
✍ Jean M. J. Tronchet; Dominique Schwarzenbach; Eva Winter-Mihaly; Charalambos Dia 📂 Article 📅 1982 🏛 John Wiley and Sons 🌐 German ⚖ 444 KB

**Free sugar radicals. V. Deoxyhydroxylaminosugar derivatives and related compounds** We describe several synthetic routes to deoxyhydroxylaminosugar derivatives of the type Glyc‐N(OH)‐R where Glyc stands for a sugar moiety linked by any of its C‐atoms except the anomeric one and R for one of the f

Radicaux libres dérivés de sucres. Parti
Radicaux libres dérivés de sucres. Partie. VII. Analogues de nucléosides marqués par un spin. Communication préliminaire
✍ Jean M. J. Tronchet; Kamal Mekhael; Joëlle Graf-Poncet; Rachid Benhamza; Michel 📂 Article 📅 1985 🏛 John Wiley and Sons 🌐 German ⚖ 211 KB

Une communication plus detaillee paraitra ulttrieurement. La structure des produits nouveaux a &ti Btablie par IR, 'H-RMN, UV, analyse ilkmentaire et, le cas tchCant, RPE du radical nitroxyde correspondant.

Ylides du soufre dérivés de sucres Commu
Ylides du soufre dérivés de sucres Communication préliminaire
✍ Jean M. J. Tronchet; Hansjörg Eder 📂 Article 📅 1975 🏛 John Wiley and Sons 🌐 German ⚖ 206 KB 👁 1 views

## Abstract __S__‐Methylation of 6‐__S__‐benzyl‐6‐deoxy‐1,2‐__O__‐isopropylidene‐3‐__O__‐methyl‐α‐D‐__xylo__‐6‐thiohexofuranos‐5‐ulose (**1**) gave the expected sulfonium salt **2** which on alcaline treatment yielded the stable sulfur ylide **3**. This compound constitutes an useful synthetic inte

Déconjugaison d'énones dérivées de sucre
Déconjugaison d'énones dérivées de sucres Communication préliminaire
✍ Jean M. J. Tronchet; Bernard Gentile; Tho Nguyen-Xuan 📂 Article 📅 1979 🏛 John Wiley and Sons 🌐 German ⚖ 187 KB

**Deconjugation of sugars enones. Preliminary Communication** Branched‐chain sugar enones **1** and **2** (**R** = Ac) deconjugated toposelectively (only the __E__ isomers reacting) to **3**. The same phenomenon was noted in the case of __Z__‐**4** which gave __E__‐**5**. The kinetic parameters of