Sodium borohydride → HCID 86684007, compound

Participants

Reaction Steps

To a solution of 135e (100 mg, 0.158 mmol) in methanol/dichloromethane(4/4 mL) was added NaBH4 (18 mg, 0.475 mmol) at room temperature. After the reaction was stirred for 1 h, LCMS indicated the reaction was complete. The reaction mixture was quenched with water (20 mL) and extracted with dichloromethane (3×20 mL). The combined organic layer was washed with brine (20 mL), dried over Na2SO4, filtered, and concentrated under reduced pressure. The residue was purified by reverse-phase prep-HPLC to afford 135 (60 mg, 60%) as a white solid. MS-ESI: [M+H]+ 635.3. 1H NMR (500 MHz, CDCl3) δ 8.66 (d, J=5.0 Hz, 1H), 8.35 (d, J=2.5 Hz, 1H), 8.00 (d, J=2.5 Hz, 1H), 7.59-7.58 (m, 1H), 7.56-7.55 (m, 1H), 7.53-7.52 (m, 2H), 7.45 (s, 1H), 6.07-5.83 (m, 1H), 5.72 (s, 1H), 4.51-4.49 (m, 2H), 4.11-4.08 (m, 2H), 4.05-4.03 (m, 1H), 3.94 (s, 2H), 3.73 (s, 3H), 3.13-3.10 (m, 2H), 3.00-2.94 (m, 2H), 1.45 (s, 9H).

Provenance & Evidence