JPS52134630A - Preparation of 6,13-dihydroquinacridone - Google Patents
Preparation of 6,13-dihydroquinacridoneInfo
- Publication number
- JPS52134630A JPS52134630A JP5105476A JP5105476A JPS52134630A JP S52134630 A JPS52134630 A JP S52134630A JP 5105476 A JP5105476 A JP 5105476A JP 5105476 A JP5105476 A JP 5105476A JP S52134630 A JPS52134630 A JP S52134630A
- Authority
- JP
- Japan
- Prior art keywords
- dihydroquinacridone
- preparation
- dihydroterephthalates
- diphenylamino
- dialkyl
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Nitrogen Condensed Heterocyclic Rings (AREA)
Abstract
PURPOSE: To prepare 6, 13-dihydroquinacridone in high yields by the ring closure of dialkyl 2,5-diphenylamino-3,6-dihydroterephthalates in inert high-boiling solvents.
COPYRIGHT: (C)1977,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5105476A JPS52134630A (en) | 1976-05-04 | 1976-05-04 | Preparation of 6,13-dihydroquinacridone |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5105476A JPS52134630A (en) | 1976-05-04 | 1976-05-04 | Preparation of 6,13-dihydroquinacridone |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS52134630A true JPS52134630A (en) | 1977-11-11 |
Family
ID=12876080
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5105476A Pending JPS52134630A (en) | 1976-05-04 | 1976-05-04 | Preparation of 6,13-dihydroquinacridone |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS52134630A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5757749A (en) * | 1980-09-26 | 1982-04-07 | Toyo Soda Mfg Co Ltd | Preparation of dihydroquinacridones |
JPH01143870A (en) * | 1987-10-27 | 1989-06-06 | Basf Ag | Production of dihydroquinacridone, quinacridone and quinacridone quinone |
US5610306A (en) * | 1993-11-19 | 1997-03-11 | Toyo Ink Manufacturing Co., Ltd. | Process for the production of 6,13-dihydroquinacridones and apparatus for use for the production |
US5659036A (en) * | 1993-06-30 | 1997-08-19 | Toyo Ink Manufacturing Co., Ltd. | Process for the production of 2,5-di(arylamino)-3,6-dihydroterephthalic acid dialkyl ester, and process for the production of quinacridone from said ester as intermediate |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2844485A (en) * | 1955-07-22 | 1958-07-22 | Du Pont | Organic pigments |
GB828053A (en) * | 1956-01-04 | 1960-02-10 | Du Pont | Symmetrical tetrahalo substituted quinacridones and process of preparing same |
-
1976
- 1976-05-04 JP JP5105476A patent/JPS52134630A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2844485A (en) * | 1955-07-22 | 1958-07-22 | Du Pont | Organic pigments |
GB828053A (en) * | 1956-01-04 | 1960-02-10 | Du Pont | Symmetrical tetrahalo substituted quinacridones and process of preparing same |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5757749A (en) * | 1980-09-26 | 1982-04-07 | Toyo Soda Mfg Co Ltd | Preparation of dihydroquinacridones |
JPH01143870A (en) * | 1987-10-27 | 1989-06-06 | Basf Ag | Production of dihydroquinacridone, quinacridone and quinacridone quinone |
US5659036A (en) * | 1993-06-30 | 1997-08-19 | Toyo Ink Manufacturing Co., Ltd. | Process for the production of 2,5-di(arylamino)-3,6-dihydroterephthalic acid dialkyl ester, and process for the production of quinacridone from said ester as intermediate |
US5817817A (en) * | 1993-06-30 | 1998-10-06 | Toyo Ink Manufacturing Co., Ltd. | Process for the production of 2,5-di(arylamino)-3,6-dihydroterephthalic acid dialkyl ester, and process for the production of quinacridone from said ester as intermediate |
US5610306A (en) * | 1993-11-19 | 1997-03-11 | Toyo Ink Manufacturing Co., Ltd. | Process for the production of 6,13-dihydroquinacridones and apparatus for use for the production |
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