GB652943A - Manufacture of xanthene dyestuffs - Google Patents

Manufacture of xanthene dyestuffs

Info

Publication number
GB652943A
GB652943A GB1990848A GB1990848A GB652943A GB 652943 A GB652943 A GB 652943A GB 1990848 A GB1990848 A GB 1990848A GB 1990848 A GB1990848 A GB 1990848A GB 652943 A GB652943 A GB 652943A
Authority
GB
United Kingdom
Prior art keywords
hydroxy
fluoran
followed
manufacture
mols
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
GB1990848A
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.)
Imperial Chemical Industries Ltd
Original Assignee
Imperial Chemical Industries Ltd
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 Imperial Chemical Industries Ltd filed Critical Imperial Chemical Industries Ltd
Priority to GB1990848A priority Critical patent/GB652943A/en
Publication of GB652943A publication Critical patent/GB652943A/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
    • C09B11/00—Diaryl- or thriarylmethane dyes
    • C09B11/04—Diaryl- or thriarylmethane dyes derived from triarylmethanes, i.e. central C-atom is substituted by amino, cyano, alkyl
    • C09B11/10—Amino derivatives of triarylmethanes
    • C09B11/24—Phthaleins containing amino groups ; Phthalanes; Fluoranes; Phthalides; Rhodamine dyes; Phthaleins having heterocyclic aryl rings; Lactone or lactame forms of triarylmethane dyes
    • C09B11/245—Phthaleins having both OH and amino substituent(s) on aryl ring

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Heterocyclic Carbon Compounds Containing A Hetero Ring Having Oxygen Or Sulfur (AREA)
  • Heat Sensitive Colour Forming Recording (AREA)

Abstract

Dyes are made by sulphonating 3.6-di-(211.611-dimethyl - anilino) - 41 - hydroxy - 51 - carboxy - fluoran and/or the corresponding 51-hydroxy-41-carboxy fluoran. The products may be chromed. The starting material may be made by condensing one mol. 5-hydroxy-trimellitic acid with two mols. of (1) 3-hydroxy-21.61-dimethyldiphenylamine, (2) m - chlorphenol, followed by condensation with two mols. 2.6-dimethylaniline, or (3) resorcinol, followed by conversion of the fluorescein derivative so obtained to the 3.6-dichloro-fluoran, and condensation as under (2). An example is given of process (1), followed by sulphonation of the product. Specification 472,757 is referred to.
GB1990848A 1948-07-26 1948-07-26 Manufacture of xanthene dyestuffs Expired GB652943A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1990848A GB652943A (en) 1948-07-26 1948-07-26 Manufacture of xanthene dyestuffs

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1990848A GB652943A (en) 1948-07-26 1948-07-26 Manufacture of xanthene dyestuffs

Publications (1)

Publication Number Publication Date
GB652943A true GB652943A (en) 1951-05-02

Family

ID=10137139

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1990848A Expired GB652943A (en) 1948-07-26 1948-07-26 Manufacture of xanthene dyestuffs

Country Status (1)

Country Link
GB (1) GB652943A (en)

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