Hydrochloric Acid → HCID 117600653, compound

Participants

Reaction Conditions

Reaction Steps

To a suspension of NaH (60%, 1.13 g, 28.35 mmol) in dry THF (20 mL) was added ethyl 2-(diethoxyphosphoryl)acetate (6.49 g, 28.35 mmol) at −78° C. After being stirred at −78° C. for 1 hour, a solution of (3-Bromo-5-trifluoromethyl-phenyl)-(5-methyl-[1,3,4]oxadiazol-2-yl)-methanone (9.047 g, 27 mmol) in 20 ml THF was added drop wise over 30 min. The mixture was stirred at −78° C. for 30 min and then warmed to room temperature followed by stirring overnight. The mixture was cooled to 0° C. and treated with water (50 mL), pH value was adjusted to 6 with HCl (0.5N) and extracted with EtOAc (50 mL×3). The combined organic layers were dried over Na2SO4, filtered, and concentrated under reduced pressure. The residue was purified by silica gel chromatography eluting with a petroleum ether/EtOAc mixture to afford 9 g of the desired product (Yield: 90%).

Provenance & Evidence