Water → HCID 86684072, compound

Participants

Reaction Steps

A mixture of 156e (191 mg, 0.30 mmol) and lithium hydroxide.1water (126 mg, 3.0 mmol) in i-propanol/THF (1:1, 8 mL) and water (2 mL) was stirred at 35° C. for 0.5 h. The mixture was evaporated under reduced pressure and diluted with water (10 mL). It was then extracted with dichloromethane (3×20 mL). The combined dichloromethane extract was concentrated under reduced pressure and the residue was purified by reverse-phase prep-HPLC to afford 156 (30 mg, 17%) as a pale yellow solid. MS-ESI: [M+H]+ 594.3. 1H NMR (500 MHz, DMSO-d6) δ 8.83 (s, 1H), 8.77 (d, J=2.0 Hz, 1H), 8.59 (d, J=5.0 Hz, 1H), 8.54 (d, J=2.5 Hz, 1H), 8.34 (d, J=2.5 Hz, 1H), 7.91 (s, 1H), 7.79-7.74 (m, 2H), 7.57-7.53 (m, 2H), 7.40 (d, J=9.0 Hz, 1H), 4.92 (bs, 1H), 4.43 (s, 2H), 3.62 (s, 3H), 1.67 (s, 6H), 1.39 (s, 9H).

Provenance & Evidence