GB567217A - Process for the preparation of monoazo dyestuffs - Google Patents

Process for the preparation of monoazo dyestuffs

Info

Publication number
GB567217A
GB567217A GB11269/43A GB1126943A GB567217A GB 567217 A GB567217 A GB 567217A GB 11269/43 A GB11269/43 A GB 11269/43A GB 1126943 A GB1126943 A GB 1126943A GB 567217 A GB567217 A GB 567217A
Authority
GB
United Kingdom
Prior art keywords
acid
aminosalicylic
amino
preparation
aminosalicylic acid
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
GB11269/43A
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.)
Sandoz AG
Original Assignee
Sandoz 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 Sandoz AG filed Critical Sandoz AG
Publication of GB567217A publication Critical patent/GB567217A/en
Expired legal-status Critical Current

Links

Landscapes

  • Coloring (AREA)

Abstract

Monoazo dyes, specially suitable for chrome-printing fibres and fabrics of natural or regenerated cellulose in brown shades, are obtained by coupling diazotised 1-amino-4-hydroxybenzene-3-carboxylic acid or a nuclear-substituted derivative thereof with 2 : 4-naphtholsulphonic acid. Examples relate to the preparation of the dyes having as diazo components: (1) p-aminosalicylic acid, (2) p-amino-o-cresotinic acid, (3) p-amino-m-cresotinic acid, (4) 6-acetylamino-4-aminosalicylic acid, (5) 4-aminosalicylic-6-sulphonic acid, (6) 6-chloro-4-aminosalicylic acid. 6 - Acetylamino - 4 - aminosalicylic acid is obtained by reducing the nitro group in the product of acetylation of 4-nitro-6-aminosalicylic acid. 4-Aminosalicylic-6-sulphonic acid is obtained by sulphonating 4-aminosalicylic acid.
GB11269/43A 1942-07-17 1943-07-12 Process for the preparation of monoazo dyestuffs Expired GB567217A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH567217X 1942-07-17

Publications (1)

Publication Number Publication Date
GB567217A true GB567217A (en) 1945-02-02

Family

ID=4520660

Family Applications (1)

Application Number Title Priority Date Filing Date
GB11269/43A Expired GB567217A (en) 1942-07-17 1943-07-12 Process for the preparation of monoazo dyestuffs

Country Status (1)

Country Link
GB (1) GB567217A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2669581A (en) * 1951-07-27 1954-02-16 American Cyanamid Co Manufacture of resorcylic acid
US2669580A (en) * 1951-07-11 1954-02-16 American Cyanamid Co Manufacture of p-alkoxysalicylic acids

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2669580A (en) * 1951-07-11 1954-02-16 American Cyanamid Co Manufacture of p-alkoxysalicylic acids
US2669581A (en) * 1951-07-27 1954-02-16 American Cyanamid Co Manufacture of resorcylic acid

Similar Documents

Publication Publication Date Title
GB1034871A (en) Water-soluble monoazo-dyestuffs and process for their manufacture
GB567217A (en) Process for the preparation of monoazo dyestuffs
GB999996A (en) Photographic layers for the silver dyestuff bleaching method
GB987740A (en) Water-insoluble disazo dyestuffs and process for their manufacture
GB973569A (en) Water-soluble yellow monoazo dyestuffs containing sulphuric acid ester groups and a process for their manufacture
GB935137A (en) Water-insoluble disazo-dyestuffs and process for their manufacture
GB1011971A (en) Water-insoluble monoazo-dyestuffs and process for their manufacture
GB984904A (en) New reactive monoazo dyestuffs
GB727045A (en) Azo dyestuffs
GB1033267A (en) Water-soluble monoazo dyestuff and processes for its manufacture
GB727421A (en) Tetrakisazo dyestuffs
GB265553A (en) Improvements in tetrakisazo dyes, and the process of manufacture
GB1036691A (en) Water-soluble thermofixable monoazo-dyestuffs containing ureidosulphonyl groups and process for their manufacture
GB499322A (en) Making disazo leather dyes
GB584838A (en) Process for the preparation of disazodyestuffs
GB561228A (en) Manufacture of o:o-dihydroxy azo dyestuffs
GB560298A (en) Dyes and dyeing
GB676114A (en) Trisazo dyestuffs
GB301564A (en) Process for the dyeing of artificial silk comprising acyl derivatives or ethers of cellulose or of its conversion products
GB695758A (en) Process for the preparation of disazo dyestuffs
GB716001A (en) Disazo dyestuffs
GB552142A (en) Water-insoluble monoazo dyestuffs
GB290720A (en) Improvements in or relating to the dyeing of esters and ethers of cellulose and its conversion products
GB594925A (en) New azo dyestuffs for wool
GB425307A (en) Improvements in the manufacture and production of diazo dyestuffs