L-Pyroglutamic Acid → (S)-N-((6-(5-Cyclopropyl-1H-pyrazol-3-ylamino)-5-fluoro-2-((S)-1-(4-fluorophenyl) ethylamino)pyridin-3-yl)methyl)-5-oxopyrrolidine-2-carboxamide

Participants

Reaction Steps

To a DCM (10 ml) solution of (S)-3-(aminomethyl)-N6-(5-cyclopropyl-1H-pyrazol-3-yl)-5-fluoro-N2-(1-(4-fluorophenyl)ethyl)pyridine-2,6-diamine (Example 3, 0.45 g, 1.17 mmol) and HBTU (0.44 g, 1.17 mmol) cooled at 0° C. was added a solution of (S)-5-oxopyrrolidine-2-carboxylic acid (0.15 g, 1.17 mmol) in DMF (5 ml), followed by the addition of DIEA (0.14 g, 1.17 mmol). The reaction was then stirred at room temperature for 1 hour and quenched with 20 ml of aqueous NaHCO3, and extracted with DCM (2×30 ml). The combined organic fractions were dried over Na2SO4, filtered, and then concentrated. The resulting oil was purified by column chromatography (DCM-MeOH=20:1) to give the title compound (0.30 g, 51%). 1H NMR (400 MHz, CD3OD) δ 7.35-7.32 (m, 2H), 7.10 (d, J=10.9 Hz, 1H), 7.00-6.96 (m, 2H), 5.80-5.65 (br s, 1H), 5.06-5.05 (m, 1H), 4.30-4.15 (m, 3H), 2.45-2.24 (m, 3H), 2.05-2.00 (m, 1H), 1.85-1.80 (m, 1H), 1.48 (d, J=6.8 Hz, 3H), 0.91-0.89 (m, 2H), 0.63-0.62 (m, 2H). MS: Calcd.: 495. Found: [M+H]+ 496.

Provenance & Evidence