1,1-Dimethylethyl 4-[({[6-amino-5-chloro-2-(methyloxy)-3-pyridinyl]carbonyl}amino)methyl]-1-piperidinecarboxylate → 6-amino-5-chloro-2-(methyloxy)-N-(4-piperidinylmethyl)-3-pyridinecarboxamide
反応式
[NH2:1][C:2]1[N:7]=[C:6]([O:8][CH3:9])[C:5]([C:10]([NH:12][CH2:13][CH:14]2[CH2:19][CH2:18][N:17](C(OC(C)(C)C)=O)[CH2:16][CH2:15]2)=[O:11])=[CH:4][C:3]=1[Cl:27]>Cl>[NH2:1][C:2]1[N:7]=[C:6]([O:8][CH3:9])[C:5]([C:10]([NH:12][CH2:13][CH:14]2[CH2:19][CH2:18][NH:17][CH2:16][CH2:15]2)=[O:11])=[CH:4][C:3]=1[Cl:27]参加物
3
実験手順
A solution of 1,1-dimethylethyl 4-[({[6-amino-5-chloro-2-(methyloxy)-3-pyridinyl]carbonyl}amino)methyl]-1-piperidinecarboxylate (step 1 in example 1, 6.20 g, 15.5 mmol) in 10% methanolic hydrochloric acid (130 ml) was stirred at room temperature for 7 h. The mixture was concentrated to ca. 30 ml. The residue was basified with 2 N aqueous sodium hydroxide (pH=10) and the aqueous layer was extracted with dichloromethane (80 ml×3). The combined organic layer was dried over magnesium sulfate and concentrated in vacuo. The residue was chromatographed on a column of aminopropyl silica gel eluting with methanol/dichloromethane (1:15) to give 3.94 g (85%) of the title compound as a white solid.