GB828704A - A new vat dyestuff of the indigoid series and process for the manufacture thereof - Google Patents

A new vat dyestuff of the indigoid series and process for the manufacture thereof

Info

Publication number
GB828704A
GB828704A GB14175/56A GB1417556A GB828704A GB 828704 A GB828704 A GB 828704A GB 14175/56 A GB14175/56 A GB 14175/56A GB 1417556 A GB1417556 A GB 1417556A GB 828704 A GB828704 A GB 828704A
Authority
GB
United Kingdom
Prior art keywords
manufacture
isatin
methoxy
methyl
vat 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
GB14175/56A
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.)
Hoechst AG
Original Assignee
Hoechst AG
Farbwerke Hoechst 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 Hoechst AG, Farbwerke Hoechst AG filed Critical Hoechst AG
Publication of GB828704A publication Critical patent/GB828704A/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
    • C09B7/00—Indigoid dyes
    • C09B7/06—Indone-thionapthene indigos

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Nitrogen And Oxygen Or Sulfur-Condensed Heterocyclic Ring Systems (AREA)

Abstract

4 - Methyl - 5 - bromo - 7 - methoxy - isatin is obtained by sulphonating 4-methyl-7-methoxy-isatin, and reacting the 5-sulphonic acid so obtained in aqueous solution with bromine. It may be converted to its ae-chloride with phosphorus pentachloride.ALSO:The invention comprises a blue-green dye of the formula <FORM:0828704/IV(c)/1> and a method of making it by condensing 4-methyl - 5 - bromo - 7 - methoxy - isatin-a - chloride with 5.7 - dimethyl - 3 - hydroxy-1-thionaphthene. An example is given.
GB14175/56A 1955-05-07 1956-05-07 A new vat dyestuff of the indigoid series and process for the manufacture thereof Expired GB828704A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE828704X 1955-05-07

Publications (1)

Publication Number Publication Date
GB828704A true GB828704A (en) 1960-02-24

Family

ID=6748369

Family Applications (1)

Application Number Title Priority Date Filing Date
GB14175/56A Expired GB828704A (en) 1955-05-07 1956-05-07 A new vat dyestuff of the indigoid series and process for the manufacture thereof

Country Status (1)

Country Link
GB (1) GB828704A (en)

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