Acetic Acid → HCID 178466866, compound

Participants

Reaction Conditions

Reaction Steps

A 50-ml egg-plant type flask was charged with 4.8 g (0.013 mol) of 8-fluoro-4-ethoxy-2,5-dimethyl-6-(1-ethyl-5-hydroxypyrazol-4-yl)carbonylthiochroman (Compound 43), 20 ml of acetic acid and 4.5 g (0.04 mol) of a 30% hydrogen peroxide aqueous solution and the mixture was heated at 100° C. for 1 hour. After allowed to cool, the reaction mixture was poured into 100 ml of water. The precipitated oil was extracted with ethyl acetate and the extract was dried over anhydrous sodium sulfate and then concentrated under reduced pressure to give 4.6 g of 8-fluoro-4-ethoxy-2,5-dimethyl-6-(1-ethyl-5-hydroxypyrazol-4-yl)carbonyl-thiochroman-1,1-dioxide (Compound 59) shown in Table 5.

Provenance & Evidence