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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HRID 2415758Generated: October 30, 2026

Pyridine → HCID 22636441, compound

https://huagongshe.com/reaction/2415758

Reaction equation

Participants

RoleNameHCIDCharge
ReactantPyridineHCID 1049—
ReactantTrifluoroacetic anhydrideHCID 9845—
ReactantHCID 22636528HCID 22636528—
SolventDichloromethaneHCID 6344—
ProductHCID 22636441HCID 2263644179.4%

Reaction Conditions

Temperature0 °C

Reaction Steps

3-Methoxy-5-isoxazolecarboxamide (J. Chem Soc. 1968, 172) (1.0 g, 7.0 mmol) was dissolved in dichloromethane (20 mL), cooled to 0° C. then pyridine (1.1 mL, 14 mmol) and trifluoroacetic anhydride (1.0 mL, 7.4 mmol) were added and the reaction was stirred at 0° C. for 40 minutes. The mixture was diluted with dichloromethane (10 mL) and then washed with 5% aqueous citric acid solution (3×20 mL). The combined organic extracts were dried (Na2SO4), and the solvent was removed in vacuo to give the title compound as a yellow oil (0.69 g).

Provenance & Evidence

DOI10.6084/m9.figshare.5104873.v1
Patent numberUS06821972B2
Source datasetuspto-grants-2004_11
ORD IDord-3d2cd1918c7f44d0942c5b4072ee5e77
Source noteuspto-grants-2004_11