Sodium hydride → HCID 67375645, compound

Participants

Reaction Steps

To a stirred solution of 4-hydroxy-piperidine-1-carboxylic acid tert-butyl ester (1.45 mmol, 0.29 g) in anhydrous DMF (1 mL) at room temperature was added sodium hydride (60% dispersion in mineral oil) (4.36 mmol, 0.175 g) and continued stirring for 10 min. To this was added a solution of 3-butyl-6-chloro-4-(4-cyclohexyloxy-phenyl)-5-trifluoromethyl-pyridazine (72.5 mmol, 25.0 g) in anhydrous DMF (1 mL). After 30 minutes, no starting material was remaining as indicated by LCMS. The reaction was quenched with water (20 mL) and extracted with ethyl acetate (2×20 mL). The combined organic layer was washed with brine (10 mL), dried (Na2SO4), filtered and concentrated under reduced pressure. The residue was purified on 24 g SiO2 cartridge using an ethyl acetate/hexanes gradient to give 4-[6-butyl-5-(4-cyclohexyloxy-phenyl)-4-trifluoromethyl-pyridazin-3-yloxy]-piperidine-1-carboxylic acid tert-butyl ester (0.17 g).

Provenance & Evidence