1,8-Diazabicyclo(5.4.0)undec-7-ene → 3-cyclopentyl-3-(4-(7-(4-(1-methylpiperidin-4-yl)phenyl)imidazo[1,2-c]pyrimidin-5-yl)-1H-pyrazol-1-yl)propanenitrile

Participants

Reaction Steps

7-(4-(1-Methylpiperidin-4-yl)phenyl)-5-(1H-pyrazol-4-yl)imidazo[1,2-c]pyrimidine (0.130 g, 0.363 mmol) and 3-cyclopentylacrylonitrile (Table 1, compound g; 0.220 g, 1.81 mmol) were suspended in DMF (10 mL) and 2,3,4,6,7,8,9,10-octahydropyrimido[1,2-a]azepine (0.2169 mL, 1.451 mmol) added in one portion. The reaction mixture was stirred at ambient temperature for 66 hours. The reaction mixture was partitioned between saturated aqueous 1 N NaOH and EtOAc. The organics were washed with brine, dried over MgSO4 and concentrated under reduced pressure to afford the crude material, which was purified by flash column chromatography (eluant: 2-6% (9:1, MeOH:NH4OH)/DCM) to furnish 3-cyclopentyl-3-(4-(7-(4-(1-methylpiperidin-4-yl)phenyl)imidazo[1,2-c]pyrimidin-5-yl)-1H-pyrazol-1-yl)propanenitrile (0.096 g, 0.200 mmol, 55.19% yield). MS (apci) m/z=480.3 (M+H).

Provenance & Evidence