ES326522A1 - Procedure for the synthesis of derivatives of estil-benil1,3,4-oxdiazol. (Machine-translation by Google Translate, not legally binding)
- Google Patents
Procedure for the synthesis of derivatives of estil-benil1,3,4-oxdiazol. (Machine-translation by Google Translate, not legally binding)
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Novartis AG
BASF Schweiz AG
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Ciba Geigy AG
Ciba AG
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Priority claimed from CH646865Aexternal-prioritypatent/CH476794A/en
Priority claimed from CH485866Aexternal-prioritypatent/CH506583A/en
Application filed by Ciba Geigy AG, Ciba AGfiledCriticalCiba Geigy AG
Publication of ES326522A1publicationCriticalpatent/ES326522A1/en
Heterocyclic Carbon Compounds Containing A Hetero Ring Having Nitrogen And Oxygen As The Only Ring Hetero Atoms
(AREA)
Abstract
Procedure for the synthesis of stilbennyl-1,3,4-oxdiazole derivatives of the formula ** (See formula) ** in which A1 represents a radical of phenyl, naphthyl, diphenylyl, styryl, stilbenyl, thienyl, 2-benzoxazolyl or 2-naphthoxazolyl, B means a bivalent bridge member of the phenylene, fureylene and thienylene series, Ax represents a radical of phenyl, diphenylyl, or naphthyl, R represents hydrogen, halogen, an alkyl, phenyl, carboxyl, sulfonic acid, hydroxyl or amino group or their substitute or functional derivatives, the terminal phenyl nuclei can, in the general formula, contain one to two R substituents, and in which also m, n and p represent the values 1 or 2, characterized by submitting an acylhydrazine of the formula ** (See formula) ** in which Ax, A1, R, B, m, n and p have the meaning set out above, in ring closure reaction, to form the corresponding 1,3,4-oxdiazole derivative, by treatment with excess thionyl chloride, at elevated temperatures. (Machine-translation by Google Translate, not legally binding)
ES0326522A1965-05-101966-05-09Procedure for the synthesis of derivatives of estil-benil1,3,4-oxdiazol. (Machine-translation by Google Translate, not legally binding)
ExpiredES326522A1
(en)
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