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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HRID 1750526Generated: November 3, 2026

Hydrochloric Acid → (1S,2S)-1-N-[3-Fluoro-5-(trifluoromethyl)pyridin-2-yl]cyclopentane-1,2-diamine hydrochloride

https://huagongshe.com/reaction/1750526

Reaction equation

Participants

RoleNameHCIDCharge
ReactantHydrochloric AcidHCID 313—
Reactanttert-Butyl N-[(1S,2S)-2-{[3-fluoro-5-(trifluoromethyl)pyridin-2-yl]amino}cyclopentyl]carbamateHCID 118308336—
Solvent1,4-DioxaneHCID 31275—
Product(1S,2S)-1-N-[3-Fluoro-5-(trifluoromethyl)pyridin-2-yl]cyclopentane-1,2-diamine hydrochlorideHCID 118308208—

Reaction Steps

To a solution of tert-butyl N-[(1S,2S)-2-{[3-fluoro-5-(trifluoromethyl)pyridin-2-yl]amino}cyclopentyl]carbamate (2.57 g, 7.08 mmol) in 1,4-dioxane (25 ml) was added HCl in 1,4-dioxane (4 M, 20 ml, 80 mmol). The reaction was stirred at room temperature for 20 hours. The reaction mixture was concentrated in vacuo and azeotropically distilled with toluene to afford the title compound.

Provenance & Evidence

DOI10.6084/m9.figshare.5104873.v1
Patent numberUS09156829B2
Source datasetuspto-grants-2015_10
ORD IDord-5eb204b9a2b04a6c8c2236b5c1d42e37
Source noteuspto-grants-2015_10