Diisopropylethylamine → N-{4-[2-Amino-5-(3,4-dimethoxyphenyl)pyridin-3-yl]phenyl}-5-(4-fluorophenyl)-4-oxo-1-[2-(tetrahydro-2H-pyran-2-yloxy)ethyl]-1,4-dihydropyridine-3-carboxamide

Participants

Reaction Steps

5-(4-Fluorophenyl)-4-oxo-1-[2-(tetrahydro-2H-pyran-2-yloxy)ethyl]-1,4-dihydropyridine-3-carboxylic acid was dissolved in DMF (2 ml), and HOAt (41 mg), HATU (170 mg), DMAP (18 mg) and DIPEA (88 μl) were added at room temperature. The reaction mixture was stirred at room temperature for three hours. The compound obtained in Step 2 of Example 1 (96 mg) was added to the reaction mixture at room temperature, followed by stirring overnight. Water was added to the reaction mixture, and the precipitated solid was collected by filtration to give 281 mg of the crude purified title compound as a solid. One hundred forty one mg of the solid was purified by PLC [dichloromethane:methanol=20:1 (v/v)], and the eluate was concentrated under reduced pressure. The residue was purified by PLC [ethyl acetate:methanol=15:1 (v/v)] to give 72 mg of the title compound.

Provenance & Evidence