## Abstract Treatment of terminal‐unsaturated sugars with stable aromatic nitrile oxides led to the expected Δ~2~‐isoxazolines, obtained as a mixture of two diastereoisomers epimeric at the new asymmetric carbon. One isomer (and in some cases both) has been isolated in a pure state. These compounds
Dérivés C-glycosyliques. XXIV. Glycosyl-4-thiazoles
✍ Scribed by Jean M. J. Tronchet; Hansjörg Eder
- Book ID
- 102855509
- Publisher
- John Wiley and Sons
- Year
- 1975
- Tongue
- German
- Weight
- 816 KB
- Volume
- 58
- Category
- Article
- ISSN
- 0018-019X
No coin nor oath required. For personal study only.
✦ Synopsis
Abstract
4‐C‐glycosylthiazoles have been prepared by reacting thiourea or thioacetamide with a 6‐S‐benzyl‐6‐chloro‐1,2‐O‐isopropylidene‐3‐O‐methyl‐α‐D‐xylo‐6‐thiohexofuranos‐5‐ulose (7). The latter compound which constitutes an interesting synthetic intermediate in carbohydrate chemistry has been obtained by successive oxidation and chlorination of 6‐S‐benzyl‐1,2‐O‐isopropylidene‐3‐O‐methyl‐α‐D‐6‐thioglucofuranose.
📜 SIMILAR VOLUMES
## 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‐
## Abstract 1,2‐O‐Isopropylidene‐3‐O‐methyl‐α‐D‐__xylo__‐pentodialdo‐1,4‐furanose and its 3‐O‐benzyl analog have been reacted with pyridinyl‐3‐methylenetriphenylphosphorane and benzimidazolyl‐2‐methylenetriphenylphosphorane. The unsaturated sugars so obtained are vinylogs of homo‐C‐glycosides whose
## Abstract The synthesis of «reversed» 1, 3, 4‐oxadiazolyl C‐nucleosides by treatment of alduronic chlorides with N‐benzoylamino‐triphenylphosphinimine or by oxidation of __aldehydo__dialdose benzoylphenylhydrazones is described. One of these compounds is the first example of an «reversed» C‐amino
**C‐Glycosylic derivatives XXXII. Synthesis of __spiro__‐C‐glycosylidenic derivatives __via__ nucleophilic cyclization.** On treatment with compounds bearing two nucleophilic groups as ethylenediamine, __o__‐phenylenediamine or their monooxa or monothia analogues, 1,2:5, 6‐di‐__O__‐isopropylidene‐α
## 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