## KeuchLtel (22. x. 74
Synthèse de sucres ramifiés et de sucres aminés ramifiés. Communication préliminaire
✍ Scribed by Jean-Marc Bourgeois
- Publisher
- John Wiley and Sons
- Year
- 1973
- Tongue
- German
- Weight
- 259 KB
- Volume
- 56
- Category
- Article
- ISSN
- 0018-019X
No coin nor oath required. For personal study only.
✦ Synopsis
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 amino‐nitrile, the other being unreactive. Several derivatives of these compounds are briefly described.
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## Abstract The syntheses of three types of sugar nitrones (aldonitrone, ketonitrone and α‐β unsaturated aldonitrone) are described. On 1,3‐dipolar cycloaddition with phenylacetylene, the aldonitrone gave two Δ~4~‐isoxazolines epimeric at the new asymetric carbon, while the same reaction on the ket
## 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
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