Sodium Carbonate → Ethyl 1-cyclopropyl-6-{6-[(ethylcarbamoyl)amino]-4-[4-(trifluoromethyl)-1,3-thiazol-2-yl]pyridin-3-yl}-4-oxo-1,4-dihydro-1,8-naphthyridine-3-carboxylate

Participants

Reaction Conditions

Reaction Steps

In a round bottomed flask, ethyl 6-bromo-1-cyclopropyl-4-oxo-1,4-dihydro-1,8-naphthyridine-3-carboxylate (Intermediate 16, 200 mg, 0.59 mmol), 6-(3-ethylureido)-4-(4-(trifluoromethyl)thiazol-2-yl)pyridin-3-ylboronic acid (Intermediate 9, 367 mg, 0.83 mmol) and sodium carbonate (125 mg, 1.18 mmol) were combined and suspended in dimethylformamide (10 mL). Argon gas was purged through the above suspension for 15 min. At the end of this period, tetrakis (triphenylphosphine) palladium (68 mg, 0.05 mM) was added under argon atmosphere and the reaction mixture was heated to 40° C. for 6 h. After completion of the reaction, the reaction mixture was cooled to room temperature and filtered through celite. The filtrate was poured into water and stirred for 30 min to obtain a solid which was filtered and washed with water and dried to afford 70 mg (20%) of ethyl 1-cyclopropyl-6-{6-[(ethylcarbamoyl)amino]-4-[4-(trifluoromethyl)-1,3-thiazol-2-yl]pyridin-3-yl}-4-oxo-1,4-dihydro-1,8-naphthyridine-3-carboxylate.

Provenance & Evidence