HuagongsheHuagongshe Chemistry Print Report · For research reference only
Water ethanol → 4-methyl-1-oxo-1H-2-benzothiopyran-3-carboxylic acid
Participants
| Role | Name | HCID | Charge |
|---|---|---|---|
| Reactant | Water ethanol | HCID 19096565 | — |
| Reactant | 5-(2-Carboxy-alpha-methylbenzylidene)rhodanine | HCID 73793485 | — |
| Product | 4-methyl-1-oxo-1H-2-benzothiopyran-3-carboxylic acid | HCID 21423681 | — |
Reaction Steps
4-Methyl-2-thiaisocoumarin-3-carboxylic acid mp. (EtOH-H2O) 250.5°-251.5° (lit mp. 243°-5°), (Found: C, 60.40; H, 3.98; S, 14.80 C11H8SO3 requires C, 59.99; H, 3.66; S, 14.56) was prepared from 5-(o-carboxy-α-methylbenzylidene) rhodanine by an analogous procedure to that described in Example 12.
Provenance & Evidence
| DOI | 10.6084/m9.figshare.5104873.v1 |
|---|---|
| Patent number | US03975535 |
| Source dataset | uspto-grants-1976_08 |
| ORD ID | ord-59a79f994c1e44f3a034a5fd588a482d |
| Source note | uspto-grants-1976_08 |