Formamidine acetate → Medorinone
反応式
[C:1]([C:4]1[CH:5]=[CH:6][C:7](=[O:15])[NH:8][C:9]=1[CH:10]=[CH:11][N:12](C)C)(=O)[CH3:2].C(O)(=O)C.C(N)=N>CN(C)C=O>[CH3:2][C:1]1[N:12]=[CH:11][CH:10]=[C:9]2[C:4]=1[CH:5]=[CH:6][C:7](=[O:15])[NH:8]2参加物
4
実験手順
A mixture containing 10.3 g of 5-acetyl-6-(2-dimethylaminoethenyl)-2(1H)-pyridinone, 10.4 g of formamidine acetate and 75 ml of dimethylformamide was heated on a steam bath for 5 hours and then concentrated to dryness on a rotary evaporator. The residue was treated with 50 ml of water and again stripped to dryness. The white residue was recrystallized from isopropyl alcohol to yield 6.7 g of 5-methyl-1,6-naphthyridin-2(1H)-one, m.p. 238°-240° C. This compound was the same as the compound of Example E-7a, e.g., a mixed melting point showed no depression and the infrared and nuclear magnetic resonance spectral data for the compounds were respectively the same.