HuagongsheHuagongshe Chemistry Print Report · For research reference only
HCID 20555895, compound → HCID 23329082, compound
Participants
| Role | Name | HCID | Charge |
|---|---|---|---|
| Reactant | HCID 20555895 | HCID 20555895 | — |
| Solvent | Ammonia | HCID 222 | — |
| Product | HCID 23329082 | HCID 23329082 | — |
Reaction Steps
375 Grams of 2-(p-methylthiophenylthio)-4-fluoro-benzoic acid (Collec.Czech.Chem.Commun. 40, pg. 3523 (1975)) were heated with 2.7 kilograms of polyphosphoric acid while stirring for 3 hours at 140 degrees Centigrade. The mixture was cooled to 110 degrees Centigrade and poured into ice-water. The precipitate was sucked off, suspended in aqueous ammonia and sucked off again. After recrystallization from pyridine 200 grams of 2-methylthio-6-fluoro-9-thioxanthone was obtained as a yellow crystalline substance which melted at 135-138 degrees Centigrade.
Provenance & Evidence
| DOI | 10.6084/m9.figshare.5104873.v1 |
|---|---|
| Patent number | US04285956 |
| Source dataset | uspto-grants-1981_08 |
| ORD ID | ord-47aac6a7db894f2cbb1c18536650691a |
| Source note | uspto-grants-1981_08 |