Ethyl Acetate → HCID 67053852, compound

Participants

Reaction Steps

tert-Butyl 3-hydroxypiperidine-1-carboxylate (100 mg, 0.5 mmol) was dissolved in dry NMP (5 mL) and NaH (20 mg, 60% in oil, 0.5 mmol) was added carefully. The mixture was stirred at room temperature for 10 min. Then, ethyl 4-chloro-2-(3-fluorophenyl)thieno[2,3-d]pyridazine-7-carboxylate (130 mg, 0.5 mmol) was added. The mixture was heated up to 80° C. and stirred for 30 min. After cooling to room temperature, EtOAc was added to dilute the reaction and washed with water and brine. The organics was dried over Na2SO4 and filtered, concentrated. The crude product was purified with column (silica gel) to give the product ethyl 4-(1-(tert-butoxycarbonyl)piperidin-3-yloxy)-2-(3-fluorophenyl)thieno[2,3-d]pyridazine-7-carboxylate (151 mg). HPLC-MS tR=2.17 min (UV254 nm); mass calculated for formula C25H28FN3O5S 501.2, observed LCMS m/z 502.2 (M+H).

Provenance & Evidence