JPS5757749A - Preparation of dihydroquinacridones - Google Patents

Preparation of dihydroquinacridones

Info

Publication number
JPS5757749A
JPS5757749A JP13279780A JP13279780A JPS5757749A JP S5757749 A JPS5757749 A JP S5757749A JP 13279780 A JP13279780 A JP 13279780A JP 13279780 A JP13279780 A JP 13279780A JP S5757749 A JPS5757749 A JP S5757749A
Authority
JP
Japan
Prior art keywords
dihydroterephthalate
diarylamino
dihydroquinacridones
dibenzyl ether
preparation
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
Application number
JP13279780A
Other languages
Japanese (ja)
Inventor
Eiji Iwamoto
Katsuya Shibata
Motohiro Hamada
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tosoh Corp
Original Assignee
Toyo Soda Manufacturing Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Toyo Soda Manufacturing Co Ltd filed Critical Toyo Soda Manufacturing Co Ltd
Priority to JP13279780A priority Critical patent/JPS5757749A/en
Publication of JPS5757749A publication Critical patent/JPS5757749A/en
Pending legal-status Critical Current

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Abstract

PURPOSE: To produce dihydroquinacridones in high purity and high yield, by heating 2,5-diarylamino-3,6-dihydroterephthalate in dibenzyl ether.
CONSTITUTION: 2,5-Diarylamino-3,6-dihydroterephthalate of formulaI(where R is lower aliphatic alkyl; X is methyl, chloro, bromo, methoxy, trifluoromethyl, etc.; n is 0, 1, 2; and at least one ortho position adjoining the -NH- group is occupied by hydrogen) is heated in the presence of dibenzyl ether as a solvent at 270W300°C for a short time under atmospheric pressure or reduced pressure to give dihydroquinacridones of formula II. The dibenzyl ether used herein is normally 5W15wt. times, preferably 7W10wt. times as much as the 2,5-diarylamino-3,6-dihydroterephthalate.
COPYRIGHT: (C)1982,JPO&Japio
JP13279780A 1980-09-26 1980-09-26 Preparation of dihydroquinacridones Pending JPS5757749A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13279780A JPS5757749A (en) 1980-09-26 1980-09-26 Preparation of dihydroquinacridones

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13279780A JPS5757749A (en) 1980-09-26 1980-09-26 Preparation of dihydroquinacridones

Publications (1)

Publication Number Publication Date
JPS5757749A true JPS5757749A (en) 1982-04-07

Family

ID=15089781

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13279780A Pending JPS5757749A (en) 1980-09-26 1980-09-26 Preparation of dihydroquinacridones

Country Status (1)

Country Link
JP (1) JPS5757749A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0313965A2 (en) * 1987-10-27 1989-05-03 BASF Aktiengesellschaft Process for the manufacture of dihydroquinacridones, of quinacridones and of quinacridone quinones
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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5010898A (en) * 1973-06-04 1975-02-04
JPS52134630A (en) * 1976-05-04 1977-11-11 Mitsubishi Chem Ind Ltd Preparation of 6,13-dihydroquinacridone

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5010898A (en) * 1973-06-04 1975-02-04
JPS52134630A (en) * 1976-05-04 1977-11-11 Mitsubishi Chem Ind Ltd Preparation of 6,13-dihydroquinacridone

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0313965A2 (en) * 1987-10-27 1989-05-03 BASF Aktiengesellschaft Process for the manufacture of dihydroquinacridones, of quinacridones and of quinacridone quinones
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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