Hydrogen chloride-ethyl acetate → HCID 67777844, compound

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Reaction Steps

A mixture of tert-butyl {(1S)-2-[4-(6-ethoxy-3-fluoropyrazolo[1,5-a]pyridin-2-yl)-3-fluorophenoxy]-1-methylethyl}carbamate (52 mg), 4 M hydrogen chloride/ethyl acetate (2 mL), and ethyl acetate (1 mL) was stirred at room temperature for 6 hr. The mixture was concentrated under reduced pressure. The residue was mixed with pyridine (1 mL) and acetic anhydride (1 mL). The mixture was stirred at room temperature overnight. 1 M hydrochloric acid was added, and the mixture was extracted with ethyl acetate. The organic layer was washed with brine, dried over anhydrous magnesium sulfate and concentrated under reduced pressure. The residue was purified by silica gel column chromatography (hexane/ethyl acetate) to give the title compound (18.7 mg) as white crystals.

Provenance & Evidence