반응 #11929

반응 방정식

(2-chloro-purin-4-yl)-(5-methyl-1H-pyrazol-3-yl)-amine

4-methylpiperidine

Potassium carbonate

→

solid

수율 90.0%

[2-(4-Methylpiperidin-1-yl)-purin-4-yl]-(5-methyl-2H-pyrazol-3-yl)-amine

수율 90.0%

반응 조건

후처리

1. 1
   기타was used in the next step without further purification
2. 2
   온도the reaction mixture heated
3. 3
   온도at reflux overnight
4. 4
   기타The solvent was evaporated
5. 5
   workup.DISSOLUTIONthe residue dissolved in a mixture EtOH:water (1:3, 4 mL)
6. 6
   여과The resulting suspension was filtered
7. 7
   세척washed with water (×2)
8. 8
   세척rinsed with Et2O (×2)

실험 절차

To a suspension of 2,4-dichloro-purine (2.0 g, 10.6 mmol) in anhydrous ethanol (10 mL) was added 5-methyl-1H-pyrazol-3-yl amine (2.05 g, 21.2 mmol). The resulting mixture was stirred at room temperature for 48 h. The resulting precipitate was collected by filtration, washed with ethanol, and dried under vacuum to afford 1.524 g (58% yield) of (2-chloro-purin-4-yl)-(5-methyl-1H-pyrazol-3-yl)-amine which was used in the next step without further purification. To a solution of (2-chloro-purin-4-yl)-(5-methyl-1H-pyrazol-3-yl)-amine (200 mg, 0.80 mmol) was added 4-methylpiperidine (4 mL, 8.01 mmol) and the reaction mixture heated at reflux overnight. The solvent was evaporated and the residue dissolved in a mixture EtOH:water (1:3, 4 mL). Potassium carbonate (57 mg, 0.41 mmol) was added and the mixture was stirred at room temperature for 2 hours. The resulting suspension was filtered, washed with water (×2) and rinsed with Et2O (×2) to afford IV-33 as a white solid (225 mg, 90%): mp>300° C.; 1H NMR (DMSO) δ 0.91 (3H, d), 1.10 (2H, m), 1.65 (3H, m), 2.24 (3H, s), 2.84 (2H, m), 4.60 (2H, m), 6.40 (1H, s), 7.87 (1H, m), 9.37–9.59 (1H, m), 12.03–12.39 (2H, m); IR (solid) 1651, 1612, 1574, 1484, 1446, 1327, 1317, 1255, 1203; MS 313.3 (M+H)+.

출처