GB322253A - Improvements in the manufacture and production of 2-alkyl-benzanthrones - Google Patents
Improvements in the manufacture and production of 2-alkyl-benzanthronesInfo
- Publication number
- GB322253A GB322253A GB2571428A GB2571428A GB322253A GB 322253 A GB322253 A GB 322253A GB 2571428 A GB2571428 A GB 2571428A GB 2571428 A GB2571428 A GB 2571428A GB 322253 A GB322253 A GB 322253A
- Authority
- GB
- United Kingdom
- Prior art keywords
- potash
- methylbenzanthrone
- benzanthrone
- boiled
- caustic
- 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
- C09B3/02—Benzathrones
- C09B3/06—Preparation from starting materials already containing the benzanthrone nucleus
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Indole Compounds (AREA)
Abstract
322,253. Johnson, J. Y., (I. G. Farbenindustrie Akt.-Ges.). Sept. 7, 1928. Alkylbenzanthrones are obtained by treating with alkaline saponifying agents the condensation products made by the process described in Specification 319,593 from benzanthrones having free 2-positions and ketones of the general formula R<1>.CO.CH2.R, where R' is a hydrocarbon radicle, which may be substituted, and R is hydrogen or an alkyl group. Suitable alkaline saponifying agents are aqueous or alcoholic caustic alkalies, and calcium and barium hydroxides. The preparation of the condensation products and the alkaline saponification may be carried out in one operation. In examples, (1) 2-acetonylbenzanthrone is boiled with aqueous caustic soda solution or with anhydrous sodium sulphide; (2) methylbenzanthrone is obtained; (2) the condensation product from benzanthrone and acetophenone is boiled with alcoholic potash to yield 2-methylbenzanthrone; (3) 2-methylbenzanthrone is obtained directly by introducing acetone in an atmosphere of nitrogen into a mixture of benzanthrone, caustic potash and monochlorbenzene, diluting the mixture with alcohol, and boiling, and (4) benzanthrone, caustic potash, and pyridine are treated with di-n-propylketone in an atmosphere of nitrogen, the reaction mass is poured into dilute hydrochloric acid, and the brown resin which separates is dissolved in alcoholic potash and the solution boiled; 2-n-propylbenzanthrone is obtained.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2571428A GB322253A (en) | 1928-09-07 | 1928-09-07 | Improvements in the manufacture and production of 2-alkyl-benzanthrones |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2571428A GB322253A (en) | 1928-09-07 | 1928-09-07 | Improvements in the manufacture and production of 2-alkyl-benzanthrones |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB322253A true GB322253A (en) | 1929-12-05 |
Family
ID=10232079
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2571428A Expired GB322253A (en) | 1928-09-07 | 1928-09-07 | Improvements in the manufacture and production of 2-alkyl-benzanthrones |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB322253A (en) |
-
1928
- 1928-09-07 GB GB2571428A patent/GB322253A/en not_active Expired
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