HuagongsheHuagongshe Chemistry Print Report · For research reference only
HRID 1644757Generated: October 31, 2026
Hydrochloric Acid → Benzamide, 2-hydroxy-N-2-thiazolyl-
https://huagongshe.com/reaction/1644757
Participants
| Role | Name | HCID | Charge |
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| Reactant | Hydrochloric Acid | HCID 313 | — |
| Reactant | Nitazoxanide Impurity | HCID 3363745 | — |
| Product | Benzamide, 2-hydroxy-N-2-thiazolyl- | HCID 578639 | 86.4% |
Reaction Steps
2-(1,3-thiazol-2-ylcarbamoyl)phenyl acetate (501, 663.3 mg, 2.53 mmol) was added to a 25 mL round bottom flask equipped with a stirbar and a water-jacketed condenser. The headspace was replaced with dry nitrogen, and concentrated hydrochloric acid (15.0 mL) was added in a single portion. The suspension was heated to 50° C., and stirred well. The suspended solids dissolved to form a clear colorless solution before solids precipitate from the reaction mixture, which was then cooled in an ice bath, and the solids were filtered on a medium frit and washed with a large portion of water. The filter cake wash washed through the frit with methanol, collected, and the solvent was removed in vacuo to give 502 (481.5 mg, 86%) as a colorless solid.
Provenance & Evidence
| DOI | 10.6084/m9.figshare.5104873.v1 |
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| Patent number | US08124632B2 |
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| Source dataset | uspto-grants-2012_02 |
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| ORD ID | ord-71aa96d776374dd6b9f9b40f46636f1e |
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| Source note | uspto-grants-2012_02 |
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