## 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
Utilisation d'ylides du phosphore non stabilisés en chimie des sucres. V. Sucres ramifiés dérivés du méthyl α-D-lyxo-hexopyrannosul-4-oside. Communication préliminaire
✍ Scribed by J. M. J. Tronchet; J. M. Chalet
- Publisher
- John Wiley and Sons
- Year
- 1970
- Tongue
- German
- Weight
- 338 KB
- Volume
- 53
- Category
- Article
- ISSN
- 0018-019X
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✦ Synopsis
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 leads to derivatives of 4‐deoxy‐4‐methyl‐hexoses of the D‐manno and D‐talo series.
📜 SIMILAR VOLUMES
## 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
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
## 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