## Abstract Treatment of keto‐sugar __p__‐nitrophenylhydrazones with lead tetraacetate led to the corresponding __gem__‐azo‐acetates. The reaction is highly stereoselective, only one of the two possible epimers at the new asymmetric carbon being formed in measurable quantity. Catalytic de‐acylation
Un nouveau type de sucres azotés : les dérivés gem-dibromo-azo
✍ Scribed by Jean M.J. Tronchet; Bruno Baehler; Joëlle Poncet; Françoise Perret; Armand Jotterand
- Book ID
- 108308245
- Publisher
- Elsevier Science
- Year
- 1974
- Tongue
- English
- Weight
- 274 KB
- Volume
- 34
- Category
- Article
- ISSN
- 0008-6215
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📜 SIMILAR VOLUMES
**Carbohydrate Derivatives Bearing a __gem__‐Dihalogenoethenyl Group** Treated with the appropriate __Wittig__ reagent, aldehydosugar derivatives (**1–13**) led in good to excellent yields to the expected __gem__‐difluoro, __gem__‐chlorofluoro‐and/or __gem__‐dichloroenoses (**14–29**). Examples of
Using parameters fitted to the pyridine spectrum, SCF calculations have been carried through for seven monoaza cyclic compounds. The results obtained are discussed in the light of available experimental data and attention is particularly drawn to the electronic spectra and the ionization potentials.
The method described in the two previous papers of this series is further extended to poly-aza-derivatives of the conjugated hydrocarbons by fitting the integral (N +:NN) to the first singlet-singlet transition of pyridazine. Results are in satisfactory agreement with experiment.