| Titre : |
Nitrones as 1,3-dipoles for the synthesis of biologically active five-membered heterocycles : the industrial application of nitrones as radical traps for the removal of nitrogen oxides from cigarette and cigar smoke |
| Type de document : |
texte imprimé |
| Auteurs : |
Wagih Sadek Ebaid, Auteur ; Nour Takla, Directeur de thèse |
| Editeur : |
Bab Ezzouar : [s.n.] |
| Année de publication : |
1981 |
| Importance : |
175 f. |
| Présentation : |
ill. |
| Format : |
27 cm. |
| Note générale : |
Thèse de Doctorat : Génie Chimique : Alger, Université des Sciences et de la Technologie Houari Boumedienne : 1981
Bibliogr. f. 176 - 190 |
| Langues : |
Anglais (eng) |
| Mots-clés : |
Five-membered heterocycles
Cycloaddition reactions
Nitrones
Nitrogen oxides
Cigarette smoke |
| Index. décimale : |
D003381 |
| Résumé : |
Benzyl-, p-substituted benzylpyridinium p-toluene-sulphonates, were prepared by the reaction of the corresponding halides with pyridine in presence of silver p-toluenesulphonate.
The result of the action of dilute aqueous sodium hydroxide on p-nitrobenzylpyridinium p-toluenesulphonate in air is summarised in the following:
The result of the action of dilute aqueous sodium hydroxide on p-nitrrobenzylpyridinium p-toluenesulphonate in air is summarised in the following:
N-(p-Nitrobenzyl)pyridinium p-toluenesulphonate gave:
a/ p,p'-diformylazoxybenzene.
b/ p-nitrobenzaldehyde.
c/ C,p-nitrophenyl-N,p-formyl-phenylnitrone.
In contrast, the corresponding compound without a nitro-group was remarkably stable and was recovered unchanged after being boiled with aqueous sodium hydroxide for 30 minutes.
Under the same conditions N-(p-methoxybenzyl)-pyridinium p-toluenesulphonate was also unchanged for 15 minutes.
The above nitrone was separeted for the first time by careful fractional crystallisation of the product obtained on treatment of N-(p-nitrobenzyl)pyridinium p-toluenesulphonate with just one equivalent of aqueous sodium hydroxide and heating in air just to boiling.
No nitrone was separated when four equivalents of alkali were used and boiling in air for 15 minutes but only p,p'-diformylazoxybenzene was obtained. |
Nitrones as 1,3-dipoles for the synthesis of biologically active five-membered heterocycles : the industrial application of nitrones as radical traps for the removal of nitrogen oxides from cigarette and cigar smoke [texte imprimé] / Wagih Sadek Ebaid, Auteur ; Nour Takla, Directeur de thèse . - Bab Ezzouar : [s.n.], 1981 . - 175 f. : ill. ; 27 cm. Thèse de Doctorat : Génie Chimique : Alger, Université des Sciences et de la Technologie Houari Boumedienne : 1981
Bibliogr. f. 176 - 190 Langues : Anglais ( eng)
| Mots-clés : |
Five-membered heterocycles
Cycloaddition reactions
Nitrones
Nitrogen oxides
Cigarette smoke |
| Index. décimale : |
D003381 |
| Résumé : |
Benzyl-, p-substituted benzylpyridinium p-toluene-sulphonates, were prepared by the reaction of the corresponding halides with pyridine in presence of silver p-toluenesulphonate.
The result of the action of dilute aqueous sodium hydroxide on p-nitrobenzylpyridinium p-toluenesulphonate in air is summarised in the following:
The result of the action of dilute aqueous sodium hydroxide on p-nitrrobenzylpyridinium p-toluenesulphonate in air is summarised in the following:
N-(p-Nitrobenzyl)pyridinium p-toluenesulphonate gave:
a/ p,p'-diformylazoxybenzene.
b/ p-nitrobenzaldehyde.
c/ C,p-nitrophenyl-N,p-formyl-phenylnitrone.
In contrast, the corresponding compound without a nitro-group was remarkably stable and was recovered unchanged after being boiled with aqueous sodium hydroxide for 30 minutes.
Under the same conditions N-(p-methoxybenzyl)-pyridinium p-toluenesulphonate was also unchanged for 15 minutes.
The above nitrone was separeted for the first time by careful fractional crystallisation of the product obtained on treatment of N-(p-nitrobenzyl)pyridinium p-toluenesulphonate with just one equivalent of aqueous sodium hydroxide and heating in air just to boiling.
No nitrone was separated when four equivalents of alkali were used and boiling in air for 15 minutes but only p,p'-diformylazoxybenzene was obtained. |
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