HuagongsheHuagongshe Chemistry Print Report · For research reference only
Methanol → 4H-1-Benzopyran-4-one, 5,7-dihydroxy-2-methyl-3-phenyl-
Participants
| Role | Name | HCID | Charge |
|---|---|---|---|
| Reactant | Methanol | HCID 887 | — |
| Reactant | Sulfuric Acid | HCID 1118 | — |
| Reactant | Sodium Hydroxide | HCID 14798 | — |
| Reactant | HCID 20394006 | HCID 20394006 | — |
| Solvent | Water | HCID 962 | — |
| Product | 4H-1-Benzopyran-4-one, 5,7-dihydroxy-2-methyl-3-phenyl- | HCID 5395695 | 78.8% |
Reaction Steps
10 g of 5,7-diacetoxy-2-methyl-isoflavone of m.p. 177°-178° C. prepared by the method described in Example 5 are boiled for 10 minutes with 50 ml of methanol and with a solution of 5 g of sodium hydroxide in 30 ml of water. On acidifying the solution with a 10% aqueous sulphuric acid, the precipitated product is filtered, affording 6 g of 5,7-dihydroxy-2-methyl-isoflavone, m.p. 228°-229° C.
Provenance & Evidence
| DOI | 10.6084/m9.figshare.5104873.v1 |
|---|---|
| Patent number | US04166862 |
| Source dataset | uspto-grants-1979_09 |
| ORD ID | ord-61610d850d794581b03bd6a423b6c053 |
| Source note | uspto-grants-1979_09 |