Methyl iodide → HCID 18916432, compound

Participants

Reaction Steps

A stirred solution of 0.85 gram (2.1 mmole) of 3-(2-t-butyl-4-chloro-6-fluorobenzoxazol-7-yl)-6-trifluoromethyl-2,4-(1H,3H)pyrimidinedione, 0.48 gram (3.5 mmole) of potassium carbonate, 0.91 gram (6.4 mmole) of iodomethane, and 35 mL of acetone was heated at 40° C. for 2 hours, then stirred at ambient temperature for 20 hours. The reaction mixture was concentrated under reduced pressure, and the concentrate was extracted with two 50 mL portions of diethyl ether. The combined extracts were dried with magnesium sulfate and filtered. The filtrate was concentrated under reduced pressure to a yellow oil, which was subjected to column chromatography on silica gel. Elution was accomplished with 8:1 hexane:ethyl acetate. The product-containing fractions were combined and concentrated under reduce pressure, yielding 0.60 gram of 3-(2-t-butyl-4-chloro-6-fluorobenzoxazol-7-yl)-1-methyl-6-trifluoromethyl-2,4-(1H,3H)pyrimidinedione, m.p. 68°-70° C. The NMR spectrum was consistent with the proposed structure.

Provenance & Evidence