Potassium Hydroxide → Rac-2-[3-(4-chlorophenyl)-4-cyclopropyl-5-oxo-4,5-dihydro-1h-1,2,4-triazol-1-yl]propionic acid
反応式
[Cl:1][C:2]1[CH:7]=[CH:6][C:5]([C:8]2[N:12]([CH:13]3[CH2:15][CH2:14]3)[C:11](=[O:16])[N:10]([CH:17]([CH3:23])[C:18]([O:20]CC)=[O:19])[N:9]=2)=[CH:4][CH:3]=1.[OH-].[K+]>CO>[Cl:1][C:2]1[CH:7]=[CH:6][C:5]([C:8]2[N:12]([CH:13]3[CH2:15][CH2:14]3)[C:11](=[O:16])[N:10]([CH:17]([CH3:23])[C:18]([OH:20])=[O:19])[N:9]=2)=[CH:4][CH:3]=1参加物
4
実験手順
630 mg (1.88 mmol) of ethyl rac-2-[3-(4-chlorophenyl)-4-cyclopropyl-5-oxo-4,5-dihydro-1H-1,2,4-triazol-1-yl]-propionate from Example 85A are placed in 8 ml methanol, treated with 4 ml 20% aqueous potassium hydroxide and stirred for 2 hours at room temperature. The methanol is removed in vacuo, the aqueous residue acidified with 2 N hydrochloric acid, extracted with dichloromethane, and the organic phase dried over sodium sulphate and evaporated in vacuo. 463 mg (80% of theory) of the target compound are thus obtained.