m-Chloroperbenzoic acid → HCID 6483576, compound

Participants

Reaction Steps

(R)-2-Methyl-6-nitro-2-[4-(thiomorpholin-4-yl)phenoxymethyl]-2,3-dihydroimidazo[2,1-b]oxazole prepared in Example 137 (85 mg, 0.23 mmol) was dissolved in methylene chloride (5 ml). To the solution, m-chloroperbenzoic acid (59 mg, 0.24 mmol) was added followed by stirring at room temperature for 20 minutes. The reaction mixture was diluted with methylene chloride. The solution was washed with a sodium thiosulfate solution, a saturated sodium hydrogencarbonate solution and a saturated saline solution, dried over magnesium sulfate and then filtered. The resulting filtrate was concentrated under reduced pressure. The residue was crystallized from methylene chloride-isopropyl ether to afford (R)-2-methyl-6-nitro-2-[4-(1-oxothiomorpholin-4-yl)phenoxymethyl]-2,3-dihydroimidazo[2,1-b]oxazole (59 mg, yield 67%) as a white powder.

Provenance & Evidence