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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HRID 390446Generated: October 27, 2026

Ammonia → 5-(2,4-Difluorophenyl)-3-(pyridin-3-yl)isoxazole

https://huagongshe.com/reaction/390446

Reaction equation

Participants

RoleNameHCIDCharge
ReactantAmmoniaHCID 222—
Reactant1-Ethynyl-2,4-difluorobenzeneHCID 5063820—
ReactantN-Hydroxy-3-pyridinecarboximidoyl chlorideHCID 53404818—
Product5-(2,4-Difluorophenyl)-3-(pyridin-3-yl)isoxazoleHCID 44546227—

Reaction Steps

The titled compound was prepared as the hydrochloride salt according to Method CB using the product of Example 1A (78 mg, 0.5 mmol) and 1-ethynyl-2,4-difluorobenzene (Aldrich, 69 mg, 0.5 mmol). 1H NMR (300 MHz, DMSO-d6) δ 7.29-7.43 (m, 1H), 7.53-7.65 (m, 2H), 7.69 (dd, J=7.5, 4.7 Hz, 1H), 8.08 (td, J=8.7, 6.3 Hz, 1H), 8.48 (dt, J=7.9, 2.0 Hz, 1H), 8.78 (dd, J=4.9, 1.5 Hz, 1H), 9.23 (d, J=1.7 Hz, 1H) ppm; MS (DCI/NH3) m/z 259 (M+H)+.

Provenance & Evidence

DOI10.6084/m9.figshare.5104873.v1
Patent numberUS08383658B2
Source datasetuspto-grants-2013_02
ORD IDord-06b91505ed964a7eb6601e5bb2bb727e
Source noteuspto-grants-2013_02