## Abstract When treated with cyanide ion, 1,2:5,6‐di‐O‐isopropylidene‐α‐~D~‐__ribo__‐hexofuranos‐3‐ulose yields one or the other of the two corresponding epimeric cyanhydrines, depending on the experimental conditions. One of these epimers, reacted with ammonium cyanide, yields the corresponding a
Utilisation d'ylides du phosphore en chimie des sucres VII. Synthèse de sucres ramifiés des types «streptose» et «apiose». Communication préliminaire
✍ Scribed by J. M. J. Tronchet; J.-M. Bourgeois; J.-M. Chalet; R. Graf; R. Gurny; Mme J. Tronchet
- Publisher
- John Wiley and Sons
- Year
- 1971
- Tongue
- German
- Weight
- 276 KB
- Volume
- 54
- Category
- Article
- ISSN
- 0018-019X
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📜 SIMILAR VOLUMES
## Abstract Two novel methods for the synthesis of terminal acetylenic sugars, both involving a chain extension by one carbon unit, are described. In the first procedure, an aldehydo‐sugar is treated with dibromomethylenetriphenyl‐phosphorane, then with __n__‐butyllithium and finally with water. Th
## Abstract Several sugars with conjugated unsaturation (dienes or α, β‐unsaturated carbonyl compounds) have been synthesised by use of __Wittig__ reactions. Keto‐sugars bearing a carbonyl group α to a furanose ring are prone to undergo an elimination leading to conjugated unsaturated systems. This
## Abstract The previously described one‐carbon chain extension of __aldehydo__‐sugars with methylthiomethylene‐triphenylphosphorane has been successfully applied to an anhydro‐__aldehydo__‐sugar and two __w__‐__aldehydo__‐sugars. Some spectroscopic properties of the so obtained methylthiovinylic s
## Abstract __Cis__ and __trans__‐methyl‐4‐deoxy‐2, 3‐O‐isopropylidene‐6‐O‐methyl‐4‐methylthio‐methylene‐α‐D‐__lyxo__‐hexopyra‐nosides are prepared by a __Wittig__ reaction. Methods are described for the determination of the configuration of the geometrical isomers whose __Raney__‐Nickel reduction
## KeuchLtel (22. x. 74