반응 #549194

반응 방정식

pentadienone

1,3-diphenyl-2-propanone

ethyl formate

sodium methoxide

disodium

1,5-dihydroxy-2,4-diphenyl-1,4-pentadien-3-one

→

3,5-diphenyl-4-pyrone

반응 조건

실험 절차

Benary and Bitter, Ber. 61, 1058 (1928) taught the synthesis of an intermediate disodium salt of 1,5-dihydroxy-2,4-diphenyl-1,4-pentadien-3-one by the condensation of 1,3-diphenyl-2-propanone with ethyl formate in the presence of sodium methoxide. The intermediate pentadienone is neutralized with strong acid to form 3,5-diphenyl-4-pyrone. Reaction of the pyrone with ammonium acetate at an elevated temperature produces 3,5-diphenyl-4(1H)-pyridinone.

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