4-Oxo-4,5,6,7-tetrahydrobenzo[b]furan-3-carboxylic acid
- CAS NO.：56671-28-4
- Empirical Formula: C9H8O4
- Molecular Weight: 180.16
- MDL number: MFCD00052170
- SAFETY DATA SHEET (SDS)
- Update Date: 2026-09-12 18:48:29
![4-Oxo-4,5,6,7-tetrahydrobenzo[b]furan-3-carboxylic acid Structural](https://img.chemicalbook.in/CAS/GIF/56671-28-4.gif)
What is 4-Oxo-4,5,6,7-tetrahydrobenzo[b]furan-3-carboxylic acid?
Chemical properties
White needle crystals. Melting point 141℃.
The Uses of 4-Oxo-4,5,6,7-tetrahydrobenzo[b]furan-3-carboxylic acid
4-Oxo-4,5,6,7-tetrahydrobenzo[b]furan-3-carboxylic acid can be used as an intermediate of Propala.
Definition
ChEBI: 4-oxo-4,5,6,7-tetrahydrobenzo[b]furan-3-carboxylic acid is a member of benzofurans.
Synthesis
The methanol solution of resorcinol and potassium hydroxide is used to react with hydrogen under the action of active nickel to generate potassium 3-ketocyclohex-1-enolate, which is then cyclized with ethyl bromopyruvate under alkaline conditions , and then acidified to obtain ?4-oxo-4,5,6,7-tetrahydrobenzo[b]furan-3-carboxylic acid.
Properties of 4-Oxo-4,5,6,7-tetrahydrobenzo[b]furan-3-carboxylic acid
| Melting point: | 140 °C |
| Boiling point: | 383.5±42.0 °C(Predicted) |
| Density | 1.406±0.06 g/cm3(Predicted) |
| storage temp. | 2-8°C |
| pka | 3.74±0.20(Predicted) |
| CAS DataBase Reference | 56671-28-4 |
Safety information for 4-Oxo-4,5,6,7-tetrahydrobenzo[b]furan-3-carboxylic acid
| Signal word | Danger |
| Pictogram(s) |
 Corrosion Corrosives GHS05 |
| GHS Hazard Statements |
H314:Skin corrosion/irritation H318:Serious eye damage/eye irritation |
| Precautionary Statement Codes |
P280:Wear protective gloves/protective clothing/eye protection/face protection. P310:Immediately call a POISON CENTER or doctor/physician. P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing. |
Computed Descriptors for 4-Oxo-4,5,6,7-tetrahydrobenzo[b]furan-3-carboxylic acid
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