## 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
Utilisation d'ylides du phosphore non stabilisés en chimie des sucres. IV. Nouveaux exemples de sucres méthylthiovinyliques terminaux. Communication préliminaire
✍ Scribed by J. M. J. Tronchet; N. Le-Hong; F. Perret
- Publisher
- John Wiley and Sons
- Year
- 1970
- Tongue
- German
- Weight
- 276 KB
- Volume
- 53
- Category
- Article
- ISSN
- 0018-019X
No coin nor oath required. For personal study only.
✦ Synopsis
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 sugars are given.
📜 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
10 Boulebard d'Yboy, 1205 G e n h c (24 TIT 69) Suvn~nnary. The action of methplthioiiicthylene-triphenylphosphorane on 2,3:4,5-di-(I-isopropylidene-aldehyde-1.-arabinose Icd with good yields to t h c corresponding unsaturatcd sugar which underwent electrophilic addition with a high regiospecificit
**__C__‐Glycosyl derivatives XXXI. Some uses in Carbohydrate Chemistry of the 2‐bromo‐2‐cyano ethenyl synthon** Sugars bearing the synthon 2‐bromo‐2‐cyano‐ethenyl, CαHCγ(Br)CN, reacted with binucleophiles, gave rise to α, α, α, β or α, γ ring‐forming reactions. __C__‐glycosyl‐dioxolanes, ‐azirid