Dimethylformamide → HCID 22499493、化合物

反応式

[H-].[Na+].[OH:3][CH:4]1[CH2:9][CH2:8][N:7]([C:10]([O:12][C:13]([CH3:16])([CH3:15])[CH3:14])=[O:11])[CH2:6][CH2:5]1.Cl[C:18]1[CH:23]=[CH:22][N:21]=[C:20]([CH3:24])[C:19]=1C#N.C[N:28](C=O)C>>[C:24]([C:20]1[CH:19]=[C:18]([O:3][CH:4]2[CH2:5][CH2:6][N:7]([C:10]([O:12][C:13]([CH3:16])([CH3:15])[CH3:14])=[O:11])[CH2:8][CH2:9]2)[CH:23]=[CH:22][N:21]=1)#[N:28]

参加物

反応物 4

HCID 6228Dimethylformamide2 回

HCID 24758Sodium hydride

HCID 643502Tert-butyl 4-hydroxypiperidine-1-carboxylate

HCID 67125855HCID 67125855、化合物

生成物 1

HCID 22499493HCID 22499493、化合物収率 71%

実験手順

NaH (60% in mineral oil, 303 mg, 7.6 mmol) in 15 mL of DMF was stirred at rt in a round-bottom flask. tert-Butyl 4-hydroxypiperidine-1-carboxylate (1.42 g, 7.0 mmol) was added in portions and the resulting mixture was stirred at rt for 30 min. 4-Chlorocyanopicoline (750 mg, 5.4 mmol) in 5 mL of DMF was added dropwise. After stirring at rt for 1 h, LC-MS indicated that the reaction was complete. The reaction mixture was then partitioned between EtOAc (30 mL) and water (25 mL). The organic layer was washed with brine (10 mL), dried over MgSO4, filtered, and concentrated under reduced pressure to give an oil which was purified by silica gel flash chromatography, eluting with 0-20% EtOAc in hexanes, to give tert-butyl 4-(2-cyanopyridin-4-yloxy)piperidine-1-carboxylate (1.2 g, 71%) as a light yellow oil. LC-MS (ESI) m/z 304 (M+H)+.