O-(4-Nitrophenyl)hydroxylamine → (2-Butyl-5-nitro-1-benzofuran-3-yl)(4-hydroxyphenyl)methanone
反応式
C([O:8][C:9]1[CH:14]=[CH:13][C:12]([C:15](=[O:23])[CH2:16][C:17](=[O:22])[CH2:18][CH2:19][CH2:20][CH3:21])=[CH:11][CH:10]=1)C1C=CC=CC=1.[N+:24]([C:27]1[CH:32]=[CH:31][C:30](ON)=[CH:29][CH:28]=1)([O-:26])=[O:25]>Br.C(O)(=O)C>[CH2:18]([C:17]1[O:22][C:30]2[CH:31]=[CH:32][C:27]([N+:24]([O-:26])=[O:25])=[CH:28][C:29]=2[C:16]=1[C:15](=[O:23])[C:12]1[CH:11]=[CH:10][C:9]([OH:8])=[CH:14][CH:13]=1)[CH2:19][CH2:20][CH3:21]参加物
4
実験手順
1-(4-Benzyloxyphenyl)-heptane-1,3-dione (191 mg; see Example 1 (a)), was suspended in 1 ml HBr/acetic acid and O-4-nitrophenylhydroxylamine, 100 mg, was added. The mixture was stirred at room temperature for 6 h. After quenching with water and extraction to EtOAc followed by evaporation of the solvent, a crude material containing approximately 125 mg of the title compound was obtained. Yield ca. 59%.