反応式
[Cl:1][C:2]1[CH:30]=[CH:29][C:5]2[N:6]([CH:10]3[CH2:15][CH2:14][N:13]([CH2:16][CH2:17][CH2:18][N:19]4[C:23]5[CH:24]=[CH:25][CH:26]=[CH:27][C:22]=5[NH:21][C:20]4=[O:28])[CH2:12][CH2:11]3)[C:7](=[O:9])[NH:8][C:4]=2[CH:3]=1.[C:31](OC(=O)C)(=[O:33])[CH3:32].C[C:39]1[CH:44]=CC=CC=1.C(=O)([O-])[O-:46].[Na+].[Na+]>O>[C:31]([N:8]1[C:4]2[CH:3]=[C:2]([Cl:1])[CH:30]=[CH:29][C:5]=2[N:6]([CH:10]2[CH2:15][CH2:14][N:13]([CH2:16][CH2:17][CH2:18][N:19]3[C:23]4[CH:24]=[CH:25][CH:26]=[CH:27][C:22]=4[N:21]([C:44](=[O:46])[CH3:39])[C:20]3=[O:28])[CH2:12][CH2:11]2)[C:7]1=[O:9])(=[O:33])[CH3:32]参加物
6
実験手順
A mixture of 5 parts of 5-chloro-1-{1-[3-(2,3-dihydro-2-oxo-1H-benzimidazol-1-yl)propyl]-4-piperidinyl}-1,3-dihydro-2H-benzimidazol-2-one, 10 parts of acetic acid anhydride and 90 parts of methylbenzene is stirred and refluxed overnight. The reaction mixture is cooled, water is added and the whole is alkalized with a diluted sodium carbonate solution. The layers are separated and the organic phase is dried, filtered and evaporated. The residue is crystallized from methylbenzene. The product is filtered off and recrystallized from methylbenzene, yielding 4.5 parts of 3-acetyl-5-chloro-1-{1-[3-(3-acetyl-2,3-dihydro-2-oxo-1H-benzimidazol-1-yl)-propyl]-4-piperidinyl}-1,3-dihydro-2H-benzimidazol-2-one; mp. 185.3° C.
後処理
- temperaturerefluxed overnight
- temperatureThe reaction mixture is cooled
- customThe layers are separated
- customthe organic phase is dried
- filtrationfiltered
- customevaporated
- customThe residue is crystallized from methylbenzene
- filtrationThe product is filtered off
- customrecrystallized from methylbenzene
出典と根拠
- ORDレコード
- ord-dd1d91501ef243b4bcb45f1720a90f29
- 出典データセット
- uspto-grants-1979_11
- 特許番号
- US04175129
関連ノート
読み込み中…