HuagongsheHuagongshe Chemistry Print Report · For research reference only
Thionyl Chloride → 7,8-dihydroxy-2-oxo-2H-1-benzopyran-3-carbonyl chloride
Participants
| Role | Name | HCID | Charge |
|---|---|---|---|
| Reactant | Thionyl Chloride | HCID 24386 | — |
| Reactant | 7,8-Dihydroxy-3-carboxy-coumarin | HCID 15173711 | — |
| Product | 7,8-dihydroxy-2-oxo-2H-1-benzopyran-3-carbonyl chloride | HCID 15173712 | — |
Reaction Steps
7,8-Dihydroxy-2-oxo-2H-1-benzopyran-3-carboxylic acid (50 mg) was heated under reflux for 5.5 hours in thionyl chloride (20 mL), and then thionyl chloride was distilled off. Benzene (10 mL) was added to the residues, and the benzene was distilled off, followed by vacuum drying, to yield 7,8-dihydroxy-2-oxo-2H-1-benzopyran-3-carbonyl chloride.
Provenance & Evidence
| DOI | 10.6084/m9.figshare.5104873.v1 |
|---|---|
| Patent number | US04468394 |
| Source dataset | uspto-grants-1984_08 |
| ORD ID | ord-b0a775df336e4d44aac03a3342aa5a5f |
| Source note | uspto-grants-1984_08 |