1,8-Diazabicyclo(5.4.0)undec-7-ene → (R)-6-chloro-N-(1-cyclobutylethyl)-3-(4-(trifluoromethyl)benzyl)-3H-imidazo[4,5-c]pyridin-4-amine

Participants

Reaction Conditions

Reaction Steps

Potassium fluoride (0.940 g, 16.18 mmol) was added to a stirred solution of 4,6-dichloro-3-(4-(trifluoromethyl)benzyl)-3H-imidazo[4,5-c]pyridine (2.8 g, 8.09 mmol) in DMA (22.40 ml). The solution was stirred at room temperature for 5 min. (R)-1-cyclobutylethanamine hydrochloride (2.194 g, 16.18 mmol) and DBU (3.66 ml, 24.27 mmol) were added and the reaction mixture was heated at 120° C. overnight. The reaction mixture was cooled to room temperature and diluted with water and EtOAc. The aqueous layer was extracted with EtOAc (2×). The organic layers were combined, dried and concentrated. The residue was purified by silica gel chromatography (0-100% ethyl acetate/hexanes, linear gradient) to afford (R)-6-chloro-N-(1-cyclobutylethyl)-3-(4-(trifluoromethyl)benzyl)-3H-imidazo[4,5-c]pyridin-4-amine. MS ESI calc'd for C20H20ClF3N4 [M+H]+ 409. found 409.

Provenance & Evidence