Document Type and Number:
Japanese Patent JPS622594
Kind Code:
B2
Abstract:
2,5-Bis-(4'-aminophenyl)-1,3,4-oxadiazoles which are chlorinated in the phenyl nuclei are obtained by condensing hydrazine or a hydrazine yielding agent with equal or different chlorinated benzoic acids or acylating acid derivatives having in para-position to the acid group an amino group or a group capable of being transformed into the amino group, and, thereafter, effecting ring closure of the so-obtained bis-hydrazide to yield the oxadiazole. The products are bis-diazo components, especially for pigments having a very high tinctorial strength, clear and pure shades, a good fastness to light, to heat and to solvents.
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| WO/2001/057004 | 1,3,4-OXADIAZOLE DERIVATIVES AND PROCESS FOR PRODUCING THE SAME |
| WO/2002/064135 | HETEROCYCLIC INHIBITORS OF GLYCINE TRANSPORTER 2 |
Inventors:
OTSUTOO FUTSUFUSU
KURAUSU FUNGERU
DEIITERU UEEBERU
RAINHARUTO ZUNKERU
KURAUSU FUNGERU
DEIITERU UEEBERU
RAINHARUTO ZUNKERU
Application Number:
JP15674777A
Publication Date:
January 20, 1987
Filing Date:
December 27, 1977
Export Citation:
Assignee:
HOECHST AG
International Classes:
C07D271/10; C07C243/38; C07D271/107; C09B35/34
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