1,8-Diazabicyclo(5.4.0)undec-7-ene → tert-butyl 3-(cyanomethyl)-3-[4-(5-fluoro-1-{[2-(trimethylsilyl)ethoxy]methyl}-1H-pyrrolo[2,3-b]pyridin-4-yl)-1H-pyrazol-1-yl]azetidine-1-carboxylate

Participants

Reaction Steps

To a solution of 5-fluoro-4-(1H-pyrazol-4-yl)-1-{[2-(trimethylsilyl)ethoxy]methyl}-1H-pyrrolo[2,3-b]pyridine (2.00 g, 6.02 mmol) and tert-butyl 3-(cyanomethylene)azetidine-1-carboxylate (1.168 g, 6.02 mmol) in acetonitrile (20 mL) was added 1,8-diazabicyclo[5.4.0]undec-7-ene (0.8996 mL, 6.02 mmol). The mixture was stirred at room temperature overnight and concentrated. The residue was purified by silica gel chromatography (0-80% EtOAc/hexanes) to give 3.05 g (96.3%) of tert-butyl 3-(cyanomethyl)-3-[4-(5-fluoro-1-{[2-(trimethylsilyl)ethoxy]methyl}-1H-pyrrolo[2,3-b]pyridin-4-yl)-1H-pyrazol-1-yl]azetidine-1-carboxylate as a colorless oil. LC/MS found: 527.3 (M+H)+.

Provenance & Evidence