Ethyl 2-oxocyclohexanecarboxylate → (2-fluoro-4-chloro-5-cyclopentyloxyphenyl)-1,2,4,5,6,7-hexahydro-3H-indazol-3-one
反応式
[F:1][C:2]1[CH:7]=[C:6]([Cl:8])[C:5]([O:9][CH:10]2[CH2:14][CH2:13][CH2:12][CH2:11]2)=[CH:4][C:3]=1[NH:15][NH2:16].C([O:19][C:20]([CH:22]1[CH2:27][CH2:26][CH2:25][CH2:24][C:23]1=O)=O)C>C(O)(=O)C>[F:1][C:2]1[CH:7]=[C:6]([Cl:8])[C:5]([O:9][CH:10]2[CH2:14][CH2:13][CH2:12][CH2:11]2)=[CH:4][C:3]=1[N:15]1[C:23]2[CH2:24][CH2:25][CH2:26][CH2:27][C:22]=2[C:20](=[O:19])[NH:16]1参加物
4
実験手順
2-Fluoro-4-chloro-5-cyclopentyloxyphenylhydrazine (24.5 g, 0.10 mol), 2-ethoxycarbonylcyclohexanone (17.0 g, 0.10 mol) were dissolved in acetic acid (200 ml), and stirred for 2 hours while heating under refluxing. After completion of the reaction, the solvent was distilled off to obtain a crude product (37 g). The product was washed with a mixed solvent of benzene/hexane to obtain 2N-(2-fluoro-4-chloro-5-cyclopentyloxyphenyl)-1,2,4,5,6,7-hexahydro-3H-indazol-3-one as a white solid (25.3 g, 72.3% yield)