Diisopropylethylamine → (E)-2'-(methylamino)-5-((1-(pent-2-enoyl)azetidin-3-yl)amino)-[3,4'-bipyridin]-6(1H)-one

Participants

Reaction Steps

To a solution of 5-(azetidin-3-ylamino)-2′-(methylamino)-[3,4′-bipyridin]-6(1H)-one di-hydrobromide (Example 14, Step 4, 80 mg, 0.19 mmol), in DMF (1 mL) was added (E)-pent-2-enoic acid (28 mg 0.28 mmol), HATU (105 mg, 0.277 mmol), and DIPEA (120 mg, 0.923 mmol). The reaction mixture was stirred at RT under nitrogen for 16 h. The residue was purified by Prep. HPLC to afford (E)-2′-(methylamino)-5-((1-(pent-2-enoyl)azetidin-3-yl)amino)-[3,4′-bipyridin]-6(1H)-one (34 mg, 42%) as a white solid: 1H NMR (400 MHz, CDCl3) δ 12.02 (s, 1H), 8.10 (d, J=5.3 Hz, 1H), 7.11 (d, J=2.1 Hz, 1H), 6.97 (dt, J=15.3, 6.4 Hz, 1H), 6.62 (dd, J=5.3, 1.6 Hz, 1H), 6.38 (d, J=1.8 Hz, 2H), 5.85 (dt, J=15.3, 1.7 Hz, 1H), 5.48 (d, J=6.6 Hz, 1H), 4.80 (d, J=5.5 Hz, 1H), 4.60 (t, J=7.9 Hz, 1H), 4.55-4.46 (m, 1H), 4.33 (dt, J=12.5, 6.3 Hz, 1H), 4.07 (m, 2H), 2.97 (d, J=4.9 Hz, 3H), 2.22 (m, 2H), 1.06 (t, J=7.4 Hz, 3H); MS (ES) m/z 354 (M+H).

Provenance & Evidence