Phenacyl bromide → 4-[3-(4,5-Dihydroisoxazol-3-yl)-4-methylsulfonyl-2-methylbenzoyl]-1-ethyl-5-phenacyloxypyrazole

Participants

Reaction Steps

0.20 g of 4-[3-(4,5-dihydroisoxazol-3-yl)-4-methylsulfonyl-2-methylbenzoyl]-1-ethyl-5-hydroxypyrazole was dissolved in 10 ml of DMF, and 0.11 g of potassium carbonate, then 0.13 g of phenacyl bromide were added. The resulting solution was stirred at room temperature overnight. The reaction solution was poured into ice water, and extracted with ethyl acetate. The organic layer was washed with water, then with a saturated sodium chloride solution, and dried over anhydrous magnesium sulfate. The solvent was distilled out under reduced pressure. Methanol was added to the residue. The obtained crystals were separated by filtration to give 0.17 g of the title compound as white crystals. m.p. 177~179° C.

Provenance & Evidence