Sodium hydride → HCID 86657812, compound

Participants

Reaction Conditions

Reaction Steps

To a stirred solution of (±)-trans-4-difluoromethyl-3-hydroxy-piperidine-1-carboxylic acid tert-butyl ester (0.52 mmol, 0.13 g) in anhydrous THF (1 mL) at room temperature was added sodium hydride (60% dispersion in mineral oil) (1.08 mmol, 0.043 g) and continued stirring for 10 min. The reaction mixture was cooled to 0° C. using an ice bath. To this was added a solution of 3-butyl-6-chloro-4-(4-cyclohexyloxy-phenyl)-pyridazine (Example 14, 0.43 mmol, 0.15 g) in anhydrous THF (1 mL). After completion of addition, the reaction mixture was warmed to room temperature and stirred for 12 hours. The reaction was quenched with water (2 mL). The reaction was then extracted with ethyl acetate (5 mL). The ethyl acetate layer was dried (Na2SO4), filtered and concentrated under reduced pressure. The residue was purified on a 12 g SiO2 cartridge using a gradient of ethyl acetate/hexanes to give (±)-trans-3-[6-butyl-5-(4-cyclohexyloxy-phenyl)-pyridazin-3-yloxy]-4-difluoromethyl-piperidine-1-carboxylic acid tert-butyl ester (0.18 g). LCMS: m/z 561 [M+1].

Provenance & Evidence