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公开(公告)号:BR7708795A
公开(公告)日:1978-08-22
申请号:BR7708795
申请日:1977-12-30
Applicant: HOECHST AG
IPC: C07D271/10 , C07C243/38 , C07D271/107 , C09B35/34
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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公开(公告)号:ZA7407041B
公开(公告)日:1975-11-26
申请号:ZA7407041
申请日:1974-11-01
Applicant: HOECHST AG
Inventor: ROCHLITZ J , ZUNKER R
IPC: C07D495/16 , C09B57/12 , C09B57/14 , G03G5/05 , G03G5/06 , C07D295/06
CPC classification number: C07D495/16 , C09B57/12 , C09B57/14 , G03G5/0578 , G03G5/0655 , G03G5/0657 , G03G5/0659
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公开(公告)号:AU500059B2
公开(公告)日:1979-05-10
申请号:AU7502274
申请日:1974-11-04
Applicant: HOECHST AG
Inventor: ROCHLITZ J , ZUNKER R
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公开(公告)号:ZA747041B
公开(公告)日:1975-11-26
申请号:ZA747041
申请日:1974-11-01
Applicant: HOECHST AG
Inventor: ROCHLITZ J , ZUNKER R
IPC: C07D495/16 , C09B57/12 , C09B57/14 , G03G5/05 , G03G5/06 , C07D295/06
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公开(公告)号:BR7409109D0
公开(公告)日:1975-08-26
申请号:BR910974
申请日:1974-10-31
Applicant: HOECHST AG
Inventor: ROCHLITZ J , ZUNKER R
IPC: C07D495/16 , C09B57/12 , C09B57/14 , G03G5/05 , G03G5/06 , C09B49/04 , C07D519/00
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公开(公告)号:BR7600681A
公开(公告)日:1976-08-31
申请号:BR7600681
申请日:1976-02-03
Applicant: HOECHST AG
Inventor: SCHIESSLER S , SPIETSCHKA E , ZUNKER R
Abstract: N,N'-dimethyl-perylene-3,4,9,10-tetracarboxylic acid diimide is obtained as a valuable pigment of a pure red shade, by reacting perylene-3,4,9,10-tetracarboxylic acid anhydride at low temperatures with a dilute aqueous solution of at least the four-fold molar amount of methylamine. The so-obtained bis-ammonium salt of the bis-N-methyl amide is then heated without isolation to effect ring closure while splitting off two mols of water and two mols of methyl amine. The product can be used without any finish operation or can be after-treated to yield a pigment of an exceptionally high transparency or of a good hiding power.
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