GB286602A - Improvements in the manufacture and production of vat dyestuffs of the dibenzanthrone series - Google Patents

Improvements in the manufacture and production of vat dyestuffs of the dibenzanthrone series

Info

Publication number
GB286602A
GB286602A GB6056/28A GB605628A GB286602A GB 286602 A GB286602 A GB 286602A GB 6056/28 A GB6056/28 A GB 6056/28A GB 605628 A GB605628 A GB 605628A GB 286602 A GB286602 A GB 286602A
Authority
GB
United Kingdom
Prior art keywords
halogen
dibenzanthronyl
dibenzanthronyls
chlorbenzanthrone
methylacrolein
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
GB6056/28A
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.)
IG Farbenindustrie AG
Original Assignee
IG Farbenindustrie 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 IG Farbenindustrie AG filed Critical IG Farbenindustrie AG
Publication of GB286602A publication Critical patent/GB286602A/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
    • C09B3/00—Dyes with an anthracene nucleus condensed with one or more carbocyclic rings
    • C09B3/22—Dibenzanthrones; Isodibenzanthrones
    • C09B3/24—Preparation by synthesis of the nucleus
    • C09B3/26—Preparation by synthesis of the nucleus from dibenzanthronyls

Landscapes

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

Abstract

286,602. I. G. Farbenindustrie Akt.- Ges. Dec. 14, 1925, [Convention date]. Divided on 262,819. Halogen- or methyl-dibenzanthrones are obtained by treating with alkaline condensing agents Bz1 : Bz1<1>-dibenzanthronyls containing halogen or methyl groups but not substituted in the 2- and 2<1>-positions. The reaction proceeds readily with alcoholic potash at temperatures slightly over 100‹ C. The products so obtained from halogen Bz1 : Bz1<1>-dibenzanthronyls differ in shade from those made by alkaline condensation of the appropriate halogen benzanthrones or halogen 2 : 2<1>-dibenzanthronyls and are also obtained in better yield. According to examples, (1) Bz2 : Bz2<1>-dimethyl - Bz1 : Bz1<1> - -dibenzanthronyl is heated with ethyl-alcoholic potash at 120-130‹ C. ; (2) 6 : 6<1>-dichlor-Bz1 : Bz1<1>-dibenzanthronyl is heated with caustic potash and aniline or ethyl alcohol; the product differs in dyeing proportions from that obtained from 6- chlorbenzanthrone bv the usual method. Bz2 : : Bz2<1>-Dimethyl-Bz1 Bz1<1>-dibenzanthronyl is obtained by treating with acid oxidizing agents the Bz2-methylbenzanthrone obtainable by condensing anthrone with alpha-methylacrolein. alpha-Methylacrolein is obtained by saponifying its dimethylacetal with dilute sulphuric acid. 6 : 6<1>-Dichlor-Bz1 : Bz1<1>-dibenzanthronyl is obtained by the oxidation of 6-chlorbenzanthrone.
GB6056/28A 1925-12-14 1926-12-13 Improvements in the manufacture and production of vat dyestuffs of the dibenzanthrone series Expired GB286602A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE286602X 1925-12-14

Publications (1)

Publication Number Publication Date
GB286602A true GB286602A (en) 1928-06-13

Family

ID=6059085

Family Applications (1)

Application Number Title Priority Date Filing Date
GB6056/28A Expired GB286602A (en) 1925-12-14 1926-12-13 Improvements in the manufacture and production of vat dyestuffs of the dibenzanthrone series

Country Status (1)

Country Link
GB (1) GB286602A (en)

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