HCID 19773959, compound → HCID 178443049, compound

Participants

Reaction Steps

60 ml of toluene and 10 g (0.12 mol) of manganese dioxide were added to 6.3 g (0.013 mol) of 4,5-dihydroxy-5-(3-hexadecyloxyphenyl)-3-hydroxy-1-phenylpyrazole and, heated and stirred for 2 hours on a steam bath. After inorganic substances were filtrated out, the remaining filtrate was concentrated and dried to a solid, and the solid product was crystallized in 20 ml of ethyl acetate. The product crystallized had a melting point of from 108° to 109° C. Yield: 5.8 g, 92.5%.

Provenance & Evidence