1-Ethyl-3-(3'-dimethylaminopropyl)carbodiimide → 4-(6-chloroimidazo[1,2-b]pyridazin-8-ylamino)-N-(1-(4-fluorophenyl)-2-oxo-1,2-dihydropyridin-3-yl)benzamide

Participants

Reaction Conditions

Reaction Steps

To a 2 dram vial was added 4-(6-chloroimidazo[1,2-b]pyridazin-8-ylamino)benzoic acid (0.050 g, 0.17 mmol, prepared as described in Example XIV, step 1b), 3-amino-1-(4-fluorophenyl)pyridin-2(1H)-one (0.053 g, 0.26) from 1a-1 and 1a-2 described below, EDCI (0.050 g, 0.26 mmol), HOBt (0.035 g, 0.26 mmol), TEA (0.07 ml, 0.51 mmol), DMF (0.8 ml) and CH3CN (0.8 ml). the reaction was allowed to stir at 50° C. for 12 hrs. Upon cooling, the solvent was removed in vacuo and diluted with methanol (2 ml). The solution was purified by HPLC (20-100% methanol gradient), which yielded 0.0.12 g of 4-(6-chloroimidazo[1,2-b]pyridazin-8-ylamino)-N-(1-(4-fluorophenyl)-2-oxo-1,2-dihydropyridin-3-yl)benzamide.

Provenance & Evidence