GB525642A - Manufacture of disazo dyestuffs - Google Patents

Manufacture of disazo dyestuffs

Info

Publication number
GB525642A
GB525642A GB6187/39A GB618739A GB525642A GB 525642 A GB525642 A GB 525642A GB 6187/39 A GB6187/39 A GB 6187/39A GB 618739 A GB618739 A GB 618739A GB 525642 A GB525642 A GB 525642A
Authority
GB
United Kingdom
Prior art keywords
acid
phenol
coupled
diazotized
dyestuff
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
GB6187/39A
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 GB525642A publication Critical patent/GB525642A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
    • C09B35/00—Disazo and polyazo dyes of the type A<-D->B prepared by diazotising and coupling
    • C09B35/02—Disazo dyes
    • C09B35/039—Disazo dyes characterised by the tetrazo component
    • C09B35/04—Disazo dyes characterised by the tetrazo component the tetrazo component being a benzene derivative

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Coloring (AREA)

Abstract

525,642. Dyes. GEIGY AKT.-GES., J. R. Feb. 24, 1939, No. 6187. Convention date, Feb. 26,1938. Addition to 507,967. [Class 2(iii)] Disazo dyes of the general formula (where A=aryl, R=a benzene residue coupled in p-position, and Y=OH, alkyl, aryl, aralkyl or an amino or substituted amino group) are made by coupling the diazo compound of a monoazo dye of the formula with a phenol coupling in p-position and treating the product with an arylsulphochloride, only coupling the diazo compound of a monoazo dye of the formula with 2:8:3:6-acid and treating the product with an arylsulphochloride. In examples, (1) the dyestuff 4-nitraniline-6-sulphonic acid# 2:8:3:6- acid is reduced, diazotized, coupled with phenol or m-cresol and the product treated with p-toluenesulphochloride (violet on wool) ; other aryl-sulphochlorides, e.g., benzene- or p-chlorbenzene-sulphochloride may be used, (2) the dyestuff 4-nitraniline-6-sulphoethylanilide# 2:8: 3:6-acid is reduced, diazotized, coupled with phenol, and treated with p-toluene sulphochloride ; other specified components are the corresponding sulphonic acid amides or diethyl- or dimethyl-amides or the methyl-sulphone, and (3) the dyestuff 4-nitro-2-methoxyaniline- 5-sulphonic acid# phenol is reduced, diazotized, coupled with 2:8:3:6-acid and treated with ptoluenesulphochloride.
GB6187/39A 1938-02-26 1939-02-24 Manufacture of disazo dyestuffs Expired GB525642A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH525642X 1938-02-26

Publications (1)

Publication Number Publication Date
GB525642A true GB525642A (en) 1940-09-02

Family

ID=4518179

Family Applications (1)

Application Number Title Priority Date Filing Date
GB6187/39A Expired GB525642A (en) 1938-02-26 1939-02-24 Manufacture of disazo dyestuffs

Country Status (1)

Country Link
GB (1) GB525642A (en)

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