Potassium Carbonate → N,N-dicyclopropyl-6-ethyl-1-methyl-4-(4-(pyridin-2-yl)thiazol-2-ylamino)-1,6-dihydroimidazo[4,5-d]pyrrolo[2,3-b]pyridine-7-carboxamide

Participants

Reaction Conditions

Reaction Steps

A solution of 4-amino-N,N-dicyclopropyl-6-ethyl-1-methyl-1,6-dihydroimidazo[4,5-d]pyrrolo[2,3-b]pyridine-7-carboxamide (example 1J, 70 mg, 0.21 mmol) and benzoyl isothiocyanate (36 μl, 0.27 mmol) in acetone (1 ml) was stirred at room temperature for 1.5 h. The solvent was removed in vacuo, the residue was taken up in EtOH (1.5 ml), and K2CO3 (40 mg, 0.290 mmol) was added. The reaction was heated at 60° C. for 3 h. Upon cooling to room temperature, 2-bromo-1-(pyridin-2-yl)ethanone, hydrobromide (139.4 mg, 0.50 mmol) was added and the reaction heated at 80° C. for 24 h. The reaction mixture was cooled to room temperature and concentrated. The residue was purified by silica gel chromatography (0-7% MeOH/dichloromethane). Re-purification by preparative HPLC provided 10.2 mg (10% yield) of N,N-dicyclopropyl-6-ethyl-1-methyl-4-(4-(pyridin-2-yl)thiazol-2-ylamino)-1,6-dihydroimidazo[4,5-d]pyrrolo[2,3-b]pyridine-7-carboxamide as a brown solid.

Provenance & Evidence