HuagongsheHuagongshe Chemistry Print Report · For research reference only
Thionyl Chloride → (2S,4S)-6-fluoro-2',5'-dioxospiro[chroman-4,4'-imidazolidine]-2-carbonyl chloride
Participants
| Role | Name | HCID | Charge |
|---|---|---|---|
| Reactant | Thionyl Chloride | HCID 24386 | — |
| Reactant | (2S,4S)-6-Fluoro-2,3-dihydro-2',5'-dioxospiro(4H-1-benzopyran-4,4'-imidazolidine)-2-carboxylic acid | HCID 9838583 | — |
| Product | (2S,4S)-6-fluoro-2',5'-dioxospiro[chroman-4,4'-imidazolidine]-2-carbonyl chloride | HCID 57210646 | — |
Reaction Steps
To thionyl chloride (24.9 ml, 3.57 mol) was added (2S,4S)-6-fluoro-2',5'-dioxospiro[chroman-4,4'-imidazolidine]-2-carboxylic acid (20.0 g, 71.4 mmol). After refluxing the mixture under argon atmosphere for 22 hours, the excess thionyl chloride was evaporated in vacuo to dryness to give quantitatively crude crystals of (2S,4S)-6-fluoro-2',5'-dioxospiro[chroman-4,4'-imidazolidine]-2-carbonyl chloride.
Provenance & Evidence
| DOI | 10.6084/m9.figshare.5104873.v1 |
|---|---|
| Patent number | US05164391 |
| Source dataset | uspto-grants-1992_11 |
| ORD ID | ord-c56d0b680bf74a5684a5042b40c5b1ef |
| Source note | uspto-grants-1992_11 |