Triethylamine → HCID 86699654, compound

Participants

Reaction Conditions

Reaction Steps

As shown in step 6-iv of Scheme 6, to a suspension of 2-(2,3-dihydrofuro[3,2-b]pyridin-7-yl)propan-1-amine.2HCl and 4,6-dichloropyrimidine (456.0 mg, 3.061 mmol) in i-PrOH (17.01 mL) was added Et3N (1.291 g, 1.778 mL, 12.76 mmol). The reaction mixture was heated at 80° C. for 2 h, cooled to room temperature, and partitioned between saturated aqueous NaHCO3 and EtOAc. The aqueous layer was further extracted with EtOAc (2×50 mL) and the combined organics were washed with H2O (50 mL) and brine (50 mL), dried (Na2SO4), filtered, and concentrated under reduced pressure. The residue was purified by silica gel chromatography (0-100% EtOAc/hexanes, then isocratic EtOAc) to afford 6-chloro-N-(2-(2,3-dihydrofuro[3,2-b]pyridin-7-yl)propyl)pyrimidin-4-amine (600.3 mg, 81% yield over two steps). Chiral SFC purification (20% MeOH at 5 mL/min on a ChiralPak® AD-H (4.6 mm×100 mm) column, 100 bar, 35° C., 220 nm) provided (S)-6-chloro-N-(2-(2,3-dihydrofuro[3,2-b]pyridin-7-yl)propyl)pyrimidin-4-amine (Compound 2021, 300 mg, SFC retention time 1.05 minutes): LCMS=291.04 (M+H); 1H NMR (400 MHz, CDCl3) δ 8.32 (s, 1H), 8.00 (d, J=4.5 Hz, 1H), 6.92 (d, J=4.4 Hz, 1H), 6.36 (s, 1H), 5.24 (s, 1H), 4.71 (t, J=8.9 Hz, 2H), 3.61-3.35 (m, 4H), 3.23 (dd, J=14.0, 6.9 Hz, 1H), 1.35 (d, J=6.9 Hz, 3H). The corresponding (R)-enantiomer had a retention time of 1.25 minutes).

Provenance & Evidence