HuagongsheHuagongshe Chemistry Print Report · For research reference only
Sodium Hydroxide → 4-Hydroxy-7,8-dimethyl-2H-1-benzopyran-2-one
Participants
| Role | Name | HCID | Charge |
|---|---|---|---|
| Reactant | Sodium Hydroxide | HCID 14798 | — |
| Reactant | 6,7-Diethyl-4-hydroxy-3-nitro-2H-1-benzopyran-2-one | HCID 54730350 | — |
| Solvent | Water | HCID 962 | — |
| Product | 4-Hydroxy-7,8-dimethyl-2H-1-benzopyran-2-one | HCID 54717111 | — |
Reaction Steps
Dilute sodium hydroxide solution was added to a suspension of 6,7-diethyl-4-hydroxy-3-nitrocoumarin (2.90g) in water (20 ml) till the pH of the solution reached 14. Filtration gave the product as a monohydrate, m.p. 249°-251°(d), (C13H12NO5Na.H2O requires C, 51.49; H, 4.65; N, 4.62; Na, 7.58. Found: C, 52.08; H, 4.65; N, 4.83; Na, 7.81) after washing with water and drying under vacuum.
Provenance & Evidence
| DOI | 10.6084/m9.figshare.5104873.v1 |
|---|---|
| Patent number | US03974289 |
| Source dataset | uspto-grants-1976_08 |
| ORD ID | ord-40654b8e1c9c403483816542ad76f8ea |
| Source note | uspto-grants-1976_08 |