Potassium tert-butoxide → (+/-)-trans-4-[6-Butyl-5-(4-cyclohexyloxy-phenyl)-pyridazin-3-yloxy]-3-fluoro-piperidine-1-carboxylic acid benzyl ester

Participants

Reaction Conditions

Reaction Steps

To a stirred solution of (±)-trans-3-fluoro-4-hydroxy-piperidine-1-carboxylic acid benzyl ester (100 mg, 0.4 mmol) at 0° C. in THF (2 mL) was added potassium tert-butoxide (1.0 M in THF, 0.5 mmol, 0.5 mL). After 15 min 3-butyl-6-chloro-4-(4-cyclohexyloxy-phenyl)-pyridazine (120 mg, 0.34 mmol) in THF (2 mL) was added. The solution was stirred overnight at 40° C., diluted with EtOAc and washed with water. The organics were dried over sodium sulfate, filtered, concentrated, and purified by column chromatography using 20-40% EtOAc in hexanes to provide (±)-trans-4-[6-butyl-5-(4-cyclohexyloxy-phenyl)-pyridazin-3-yloxy]-3-fluoro-piperidine-1-carboxylic acid benzyl ester (65 mg).

Provenance & Evidence