GB499742A - Manufacture of a 1-amino-2-hydroxynaphthalenesulphonic-3-carboxylic acid, or of a corresponding 2-hydroxynaphthalenesulphonic-3-carboxylic acid - Google Patents

Manufacture of a 1-amino-2-hydroxynaphthalenesulphonic-3-carboxylic acid, or of a corresponding 2-hydroxynaphthalenesulphonic-3-carboxylic acid

Info

Publication number
GB499742A
GB499742A GB30505/38A GB3050538A GB499742A GB 499742 A GB499742 A GB 499742A GB 30505/38 A GB30505/38 A GB 30505/38A GB 3050538 A GB3050538 A GB 3050538A GB 499742 A GB499742 A GB 499742A
Authority
GB
United Kingdom
Prior art keywords
carboxylic acid
hydroxynaphthalenesulphonic
amino
manufacture
copper
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
GB30505/38A
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.)
Novartis AG
Original Assignee
JR Geigy 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 JR Geigy AG filed Critical JR Geigy AG
Publication of GB499742A publication Critical patent/GB499742A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C309/00—Sulfonic acids; Halides, esters, or anhydrides thereof
    • C07C309/01—Sulfonic acids
    • C07C309/28—Sulfonic acids having sulfo groups bound to carbon atoms of six-membered aromatic rings of a carbon skeleton
    • C07C309/45—Sulfonic acids having sulfo groups bound to carbon atoms of six-membered aromatic rings of a carbon skeleton containing nitrogen atoms, not being part of nitro or nitroso groups, bound to the carbon skeleton
    • C07C309/49—Sulfonic acids having sulfo groups bound to carbon atoms of six-membered aromatic rings of a carbon skeleton containing nitrogen atoms, not being part of nitro or nitroso groups, bound to the carbon skeleton the carbon skeleton being further substituted by singly-bound oxygen atoms
    • C07C309/50—Sulfonic acids having sulfo groups bound to carbon atoms of six-membered aromatic rings of a carbon skeleton containing nitrogen atoms, not being part of nitro or nitroso groups, bound to the carbon skeleton the carbon skeleton being further substituted by singly-bound oxygen atoms having at least one of the sulfo groups bound to a carbon atom of a six-membered aromatic ring being part of a condensed ring system

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

A 1-amino-2-hydroxynaphthalenesulphonic-3-carboxylic acid is prepared by sulphonating 1 - amino - 2 - hydroxynaphthalene - 3 - carboxylic acid. The corresponding 2-hydroxynaphthalenesulphonic-3-carboxylic acid is obtained by eliminating the amino group from the 1-amino-2-hydroxynaphthalenesulphonic - 3 - carboxylic acid, e.g. by diazotizing it in neutral solution, and heating the separated diazo compound with ethyl alcohol in the presence of copper and copper sulphate. The new compounds are useful as intermediates for dyes.
GB30505/38A 1937-10-22 1938-10-21 Manufacture of a 1-amino-2-hydroxynaphthalenesulphonic-3-carboxylic acid, or of a corresponding 2-hydroxynaphthalenesulphonic-3-carboxylic acid Expired GB499742A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH499742X 1937-10-22

Publications (1)

Publication Number Publication Date
GB499742A true GB499742A (en) 1939-01-27

Family

ID=4516874

Family Applications (1)

Application Number Title Priority Date Filing Date
GB30505/38A Expired GB499742A (en) 1937-10-22 1938-10-21 Manufacture of a 1-amino-2-hydroxynaphthalenesulphonic-3-carboxylic acid, or of a corresponding 2-hydroxynaphthalenesulphonic-3-carboxylic acid

Country Status (1)

Country Link
GB (1) GB499742A (en)

Similar Documents

Publication Publication Date Title
CH217678A (en) Process for the preparation of a mixture of phthalocyanine sulfonic acids.
CH211857A (en) Process for the production of stable copper phthalocyanine.
GB455556A (en) Improvements relating to the production of coloured photographic pictures
GB499742A (en) Manufacture of a 1-amino-2-hydroxynaphthalenesulphonic-3-carboxylic acid, or of a corresponding 2-hydroxynaphthalenesulphonic-3-carboxylic acid
GB380563A (en) Manufacture of 6-bromo-2-hydroxynaphthalene and 4:6-dibromo-2-hydroxynaphthalene
GB497698A (en) Improvements in or relating to colour-formers for use in colour photography
GB469537A (en) The manufacture of monoazodyestuffs
GB417497A (en) Manufacture of ortho-amino-azo-compounds
GB413417A (en) Improvements in or relating to the manufacture of nitro-arsanilic acid
GB517673A (en) Manufacture of 1-amino-2-chloro (or bromo) -4 (or 6) -nitrobenzene-6 (or 4) -sulphonic acid
GB455216A (en) Manufacture of azo-dyestuffs
CH221832A (en) Process for the preparation of 2-bromo-6-nitro-1-aminobenzene-4-sulfonic acid.
GB450128A (en) The manufacture of nitro-azo-dyestuffs containing metal
AU455067B2 (en) Basic azo dyes free from sulphonic acid groups, their production and use
GB539528A (en) Process for the manufacture of an azo dyestuff from para-amino-phenyl-arsonic acid
CA340584A (en) Sulphonic acid
CA342261A (en) Sulphonic acid
GB455621A (en) Manufacture of 4-hydroxypyrene
CA319001A (en) Sulphuric acid chamber
CA342813A (en) Purified sulphonic acid
GB342551A (en) The manufacture of 1-hydroxy-4-halogen-anthraquinone-2-sulphonic acids
AU2166470A (en) Basic azo dyes free from sulphonic acid groups, their production and use
AT152569B (en) Process for the preparation of pyridinedicarboxylic acid bis-alkylamides.
GB486904A (en) Manufacture of ortho-oxyazo-dyestuffs
CA321655A (en) Sulphonic acid