BE777544A - Dihydroxy and diacetoxy-3-formyl-chromones -antiallergic - agents for treatment of bronchial asthma and dermatosis - Google Patents
Dihydroxy and diacetoxy-3-formyl-chromones -antiallergic - agents for treatment of bronchial asthma and dermatosisInfo
- Publication number
- BE777544A BE777544A BE777544A BE777544A BE777544A BE 777544 A BE777544 A BE 777544A BE 777544 A BE777544 A BE 777544A BE 777544 A BE777544 A BE 777544A BE 777544 A BE777544 A BE 777544A
- Authority
- BE
- Belgium
- Prior art keywords
- diacetoxy
- dihydroxy
- chromones
- dermatosis
- antiallergic
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D311/00—Heterocyclic compounds containing six-membered rings having one oxygen atom as the only hetero atom, condensed with other rings
- C07D311/02—Heterocyclic compounds containing six-membered rings having one oxygen atom as the only hetero atom, condensed with other rings ortho- or peri-condensed with carbocyclic rings or ring systems
- C07D311/04—Benzo[b]pyrans, not hydrogenated in the carbocyclic ring
- C07D311/22—Benzo[b]pyrans, not hydrogenated in the carbocyclic ring with oxygen or sulfur atoms directly attached in position 4
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)
Abstract
Title cpds. of formula: (where R1, R2 = hydroxy or acetoxy in the 5,6,7 or 8 posns) are prepd by a Vilsmeier reaction using a dihydroxy or diacetoxy-2-hydroxy-acetophenone.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BE777544A BE777544A (en) | 1971-12-30 | 1971-12-30 | Dihydroxy and diacetoxy-3-formyl-chromones -antiallergic - agents for treatment of bronchial asthma and dermatosis |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BE777544A BE777544A (en) | 1971-12-30 | 1971-12-30 | Dihydroxy and diacetoxy-3-formyl-chromones -antiallergic - agents for treatment of bronchial asthma and dermatosis |
Publications (1)
Publication Number | Publication Date |
---|---|
BE777544A true BE777544A (en) | 1972-04-17 |
Family
ID=3859072
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
BE777544A BE777544A (en) | 1971-12-30 | 1971-12-30 | Dihydroxy and diacetoxy-3-formyl-chromones -antiallergic - agents for treatment of bronchial asthma and dermatosis |
Country Status (1)
Country | Link |
---|---|
BE (1) | BE777544A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3984441A (en) | 1971-06-21 | 1976-10-05 | Takeda Chemical Industries, Ltd. | Chromonealdehyde compounds and process for the production thereof |
US4008252A (en) | 1973-04-18 | 1977-02-15 | Warner-Lambert Company | Substituted-3-formylchromone derivatives |
-
1971
- 1971-12-30 BE BE777544A patent/BE777544A/en not_active IP Right Cessation
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3984441A (en) | 1971-06-21 | 1976-10-05 | Takeda Chemical Industries, Ltd. | Chromonealdehyde compounds and process for the production thereof |
US4008252A (en) | 1973-04-18 | 1977-02-15 | Warner-Lambert Company | Substituted-3-formylchromone derivatives |
US4098799A (en) | 1973-04-18 | 1978-07-04 | Warner-Lambert Company | 3-formylchromones |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
RE20 | Patent expired |
Owner name: TAKEDA CHEMICAL INDUSTRIES LTD Effective date: 19911230 |