Diisopropylethylamine → N-(4-tert-Butyl-6-methyl-pyridin-2-yl)-2-[2-fluoro-4-(7-pyridin-4-yl-imidazo[1,2-a]pyridin-3-yl)-phenyl]-acetamide

Participants

Reaction Steps

Combine [2-fluoro-4-(7-pyridin-4-yl-imidazo[1,2-a]pyridin-3-yl)-phenyl]-acetic acid dihydrochloride (0.66 g, 1.57 mmol), 4-tert-butyl-6-methyl-pyridin-2-yl-amine (0.26 g, 1.57 mmol), HATU (0.72 g, 1.57 mmol), diisopropylethylamine (8.12 g, 11.2 mL, 6.28 mmol) in DMF (10 mL) and stir at ambient temperature for 3 hours. Pour the reaction contents onto a pre-washed (with methanol) Varian SCX column (25 g) and wash the column with portions (30 mL) of dichloromethane (2×) and methanol (3×). Elute the product with 2N methanolic ammonia (75 mL) and concentrate the solution to dryness. Chromatograph the crude product on silica using (0-5%) methanol in dichloromethane. Recrystallization from dichloromethane/ether/hexanes provides N-(4-tert-Butyl-6-methyl-pyridin-2-yl)-2-[2-fluoro-4-(7-pyridin-4-yl-imidazo[1,2-a]pyridin-3-yl)-phenyl]-acetamide (0.17 g). MS(ES), m/z 494 (M+1).

Provenance & Evidence