La "Cortesia" dai provenzali a Dante

Speroni, Charles; Vallone, Aldo

doi:10.2307/477245

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Schcma 4 Dpcomposition Des Triazpnes 1 Et Des Arylazo-4-dim1

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1979

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“…I1 est accompagne, en faibles quantitks, de deux produits de mCme masse moleculaire auxquels nous avons attribue les structures 17 et 18. Avec la dimCthyl-3,5-pyridine, nous avons Cgalement caractkrise un produit de dimkrisation, le bis (mCthyl-5-pyridyl-3)-1,2-kthane (19). Un Cchantrllon temoin a ete obtenu par decomposition thermique du peroxyde de t-butyle dam le substrat.…”

Section: Schcma 4 Dpcomposition Des Triazpnes 1 Et Des Arylazo-4-dimunclassified

Etude en série triazénique. IV. Synthèse et réactivité d'aryl‐3‐(diméthyl‐3,4‐isoxazolyl‐5)‐1‐triazènes et d'arylazo‐4‐diméthyl‐3,4‐isoxazolones‐5

Siv¹,

Vernin²,

Metzger³

1979

Helvetica Chimica Acta

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Synthesis and reactivity of 3‐aryl‐1‐(3,4‐dimethyl‐5‐isoxazolyl)‐triazenes and 4‐arylazo‐3,4‐dimethylisoxazol‐5‐ones According to the experimental conditions and the nature of the substituents on the aromatic ring, aryldiazonium salts react with 5‐amino‐3,4‐dimethylisoxazole (3) leading to either 3‐aryl‐1 (3,4‐dimethyl‐5‐isoxazolyl)‐triazenes (1A) or 4‐arylazo‐3,4‐dimethylisoxazol‐5‐ones (4). Analyses of the products resulting from thermal decomposition of these triazenes in aromatic substrates and in DMSO and their behaviour in acidic medium show that it is essentially the arylazo form 1B which is reactive.

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Section: Schcma 4 Dpcomposition Des Triazpnes 1 Et Des Arylazo-4-dimunclassified