Process for the preparation of bis-triazolylstilbenes

Details Process for the preparation of bis-triazolylstilbenes Process for the preparation of bis-triazolylstilbenes

1978-10-11

1980-08-12

Demers, Arthur P.

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548255, C07D24906

Patent

active

042174490

ABSTRACT:
Process for the preparation of bis-triazolylstilbene compounds which, in the form of the free acid, correspond to the formula ##STR1## wherein the phenyl radicals A can be substituted by halogen, C.sub.1 -C.sub.4 -alkyl or C.sub.1 -C.sub.4 -alkoxy, from bis-hydroxyiminohydrazonostilbene compounds of the formula ##STR2## characterized in that the bis-hyroxyiminohydrazonostilbene compounds are reacted with anhydrides of lower carboxylic acids in the presence of urea and polar solvents at temperatures from 10.degree. to 60.degree. C.

REFERENCES:
patent: 3666758 (1972-05-01), Dorlars et al.
patent: 3928329 (1975-12-01), Fleck et al.
patent: 3947412 (1976-03-01), Claussen
patent: 3965094 (1976-06-01), Claussen et al.
patent: 4005098 (1977-01-01), Dorlars et al.
D'Olieslager et al., Bull. Soc. Chim., France, 1967, #1, pp. 179-188.

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