Sodium hydride → HCID 23081337, compound

Participants

Reaction Steps

A mixture of 2-chloro-4-nitro-1H-imidazole (170 mg, 1.15 mmol), 3-(2-methyloxiran-2-ylmethyl)-5-phenyl-3H-[1,3,4]oxadiazol-2-one (310 mg, 0.9 mmol), sodium hydrogencarbonate (120 mg, 1.43 mmol) and ethanol (2 ml) was stirred under reflux for 2.5 hours. The reaction mixture was allowed to return to room temperature, then diluted with water. The solution was extracted with methylene chloride. The organic phase was dried over magnesium sulfate and then filtered. The filtrate was concentrated under reduced pressure, the residue was dissolved in 1,4-dioxane (10 ml). To the solution, sodium hydride (55 mg, 1.38 mmol) was added followed by stirring at room temperature for 1 hour and then stirring under reflux for 1.5 hours. The reaction mixture was allowed to return to room temperature. To the solution, water was added, and the mixture was extracted with methylene chloride. The organic phase was dried over magnesium sulfate and then filtered. The filtrate was concentrated under reduced pressure, and the residue was recrystallized from ethanol to afford 3-(2-methyl-6-nitro-2,3-dihydro-imidazo[2,1-b]oxazol-2-ylmethyl)-5-phenyl-3H-[1,3,4]-oxadiazol-2-one (127 mg, yield 32%) as a light brown powder.

Provenance & Evidence