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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

Reaction equation

Participants

RoleNameHCIDCharge
ReactantHydrochloric AcidHCID 313—
ReactantNitazoxanide ImpurityHCID 3363745—
ProductBenzamide, 2-hydroxy-N-2-thiazolyl-HCID 57863986.4%

Reaction Conditions

Temperature50 °C

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

DOI10.6084/m9.figshare.5104873.v1
Patent numberUS08124632B2
Source datasetuspto-grants-2012_02
ORD IDord-71aa96d776374dd6b9f9b40f46636f1e
Source noteuspto-grants-2012_02