GB975466A - Process for the production of 2,5-diarylamino-terephthalic acids - Google Patents

Process for the production of 2,5-diarylamino-terephthalic acids

Info

Publication number
GB975466A
GB975466A GB1015462A GB1015462A GB975466A GB 975466 A GB975466 A GB 975466A GB 1015462 A GB1015462 A GB 1015462A GB 1015462 A GB1015462 A GB 1015462A GB 975466 A GB975466 A GB 975466A
Authority
GB
United Kingdom
Prior art keywords
acid
diarylamino
terephthalic acid
terephthalic
chloranilido
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.)
Expired
Application number
GB1015462A
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.)
Cassella Farbwerke Mainkur AG
Original Assignee
Cassella Farbwerke Mainkur AG
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 Cassella Farbwerke Mainkur AG filed Critical Cassella Farbwerke Mainkur AG
Publication of GB975466A publication Critical patent/GB975466A/en
Expired legal-status Critical Current

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  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

2,5-Diarylamino-terephthalic acids are prepared by the simultaneous oxidation and saponification of the corresponding 2,5-diarylamino-3, 6-dihydro-terephthalic acid dialkyl esters with aqueous alcoholic dyes and atmospheric oxygen at a temperature not exceeding the reflux temperature of the reaction mixture in the presence of less than 10% by wt. of an oxidation catalyst and then acidifying the product to obtain the free acid. Suitable oxidation catalysts specified are anthroquinone, phenanthrene-quinone, naphthoquinone, chloranil, naphthoquinone-, anthraquinone-, and phenanthrene-quinone sulphonic acids, and anthraquinone-, phenanthrene-quinone- and naphthoquinone-carboxylic acids. The reaction mixture obtained in the preparation of the 2,5-diarylamino-3, 6-dihydroterephthalic acid dialkyl esters from the reaction of 1 mol of succinylosuccinic acid dialkyl acid ester with 2 mols of an arylamine in alcoholic solution, may be used as the starting material instead of the isolated 2,5-diarylamino-3, 6-dihydro-terephthalic acid dialkyl esters. Six examples are given, illustrating the preparation of 2,5-dianilido-terephthalic; acid; 2,5-di-(p-toluidino)-terephthalic acid; 2,5-di-(o-chloranilido)-terephthalic acid; 2,5-di-(p-chloranilido)-terephthalic acid; 2, 5-di-(31, 41-di-chloranilido)-terephthalic acid; and 2, 5-di-(p-phenetrolino)-terephthalic acid respectively.
GB1015462A 1961-03-17 1962-03-16 Process for the production of 2,5-diarylamino-terephthalic acids Expired GB975466A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEC23672A DE1144285B (en) 1961-03-17 1961-03-17 Process for the preparation of 2, 5-diarylaminoterephthalic acids
DEC24761A DE1147953B (en) 1961-03-17 1961-08-01 Process for the preparation of 2, 5-diarylaminoterephthalic acids

Publications (1)

Publication Number Publication Date
GB975466A true GB975466A (en) 1964-11-18

Family

ID=25969392

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1015462A Expired GB975466A (en) 1961-03-17 1962-03-16 Process for the production of 2,5-diarylamino-terephthalic acids

Country Status (3)

Country Link
CH (1) CH397715A (en)
DE (2) DE1144285B (en)
GB (1) GB975466A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4435589A (en) 1981-02-10 1984-03-06 Bayer Aktiengesellschaft Process for the preparation of dimethyl succinylosuccinate, the disodium salt thereof, dianilinodihydroterephthalic acids, the dimethyl esters and salts thereof, and dianilinoterephthalic acids, and the dimethyl esters and salts thereof
EP0363756A2 (en) * 1988-10-12 1990-04-18 Bayer Ag Method for the preparation of 2,5-diarylamino-terephthalic acids

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4435589A (en) 1981-02-10 1984-03-06 Bayer Aktiengesellschaft Process for the preparation of dimethyl succinylosuccinate, the disodium salt thereof, dianilinodihydroterephthalic acids, the dimethyl esters and salts thereof, and dianilinoterephthalic acids, and the dimethyl esters and salts thereof
EP0363756A2 (en) * 1988-10-12 1990-04-18 Bayer Ag Method for the preparation of 2,5-diarylamino-terephthalic acids
US4981997A (en) * 1988-10-12 1991-01-01 Bayer Aktiengesellschaft Process for the preparation of 2,5-diarylaminoterephthalic acids
EP0363756A3 (en) * 1988-10-12 1991-03-27 Bayer Ag Method for the preparation of 2,5-diarylamino-terephthalic acids

Also Published As

Publication number Publication date
DE1144285B (en) 1963-02-28
DE1147953B (en) 1963-05-02
CH397715A (en) 1965-08-31

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