Methyl chloroformate → 2-[2-fluoro-4-(2-[(1S,2R)-2-{1-[5-(methoxymethyl)pyrimidine-2-yl]piperidin-4-yl]cyclopropyl}ethoxy)phenyl]acetohydrazide

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Reaction Conditions

Reaction Steps

A solution [2-fluoro-4-(2-{(1S,2R)-2-{1-[5-(methoxymethyl)pyrimidin-2-yl]piperidin-4-yl}cyclopropyl}ethoxy)phenyl]acetic acid (500 mg, 1.152 mmol) in 5 mL of THF was cooled to −10° C. TEA (0.177 mL, 1.268 mmol) and methyl chloroformate (0.098 mL, 1.268 mmol) were added and the mixture stirred for 30 minutes at −10° C. The precipitate was filtered and the filtercake washed with 10 mL of THF. The filtrate was collected, concentrated under reduced pressure. The residue (265 mg, 0.539 mmol) was dissolved in 1 mL of DMF and hydrazine monohydrate (0.052 mL, 1.077 mmol) added. The resulting mixture was stirred overnight at room temperature, diluted with ethyl acetate (3 mL), washed with water (2 mL), and brine (2 mL). The organic fractions were dried over sodium sulfate, filtered, and concentrated under reduced pressure. The residue was purified via preparative TLC (1000 μM, silica gel) developing with 5% methanol in DCM. The band containing the product was collected and the silica washed with 10% methanol in DCM. The filtrate was collected and concentrated under reduced pressure to afford the title compound. HPLC/MS; 1.31 min(2 minute run), 458 (M+H)+.

Provenance & Evidence