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 seriesInfo
- 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
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.
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) |
-
1926
- 1926-12-13 GB GB6056/28A patent/GB286602A/en not_active Expired
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