C[O:2][C:3]([C:5]1[CH:6]=[C:7]([CH3:36])[C:8]2[N:12]=[C:11]([CH2:13][CH2:14][CH3:15])[N:10]([CH2:16][C:17]3[CH:34]=[CH:33][C:20]4/[C:21](=[CH:30]/[C:31]#[N:32])/[C:22]5[CH:29]=[CH:28][CH:27]=[CH:26][C:23]=5[CH2:24][CH2:25][C:19]=4[CH:18]=3)[C:9]=2[CH:35]=1)=[O:4].[OH-].[Na+].Cl>C(O)C>[C:3]([C:5]1[CH:6]=[C:7]([CH3:36])[C:8]2[N:12]=[C:11]([CH2:13][CH2:14][CH3:15])[N:10]([CH2:16][C:17]3[CH:34]=[CH:33][C:20]4/[C:21](=[CH:30]/[C:31]#[N:32])/[C:22]5[CH:29]=[CH:28][CH:27]=[CH:26][C:23]=5[CH2:24][CH2:25][C:19]=4[CH:18]=3)[C:9]=2[CH:35]=1)([OH:4])=[O:2][step 2] (E)-[2-(6-Methoxycarbonyl-4-methyl-2-propylbenzimidazol-1-yl)methyl-10,11-dihydro-5H-dibenzo[a,d]cyclohepten-5-ylidene]acetonitrile (500 mg, 1.05 mmol) obtained in step 1 was dissolved in ethanol (7.5 mL), 2 mol/L aqueous sodium hydroxide solution (2.5 mL) was added, and the mixture was stirred under reflux for 30 min. The mixture was adjusted to pH 2 with 2 mol/L hydrochloric acid, and the precipitated solid was collected by filtration to give the title compound (554 mg) quantitatively.
読み込み中…