反应详情

A mixture of Example 176C (30 mg, 0.062 mmol) and sodium borohydride (10 mg, 0.186 mmol) in methanol was stirred at ambient temperature for one hour then concentrated under reduced pressure. The residue was purified by preparative reverse phase HPLC then lyophilized to provide the desired product as the acetate salt. 1H NMR (DMSO-d6, 400 MHz) δ 9.51 (s, 1H), 7.99 (d, 1H), 7.97 (s, 1H), 7.69 (d, 1H), 7.62 (s, 1H), 7.58 (m, 1H), 7.35 (s, 1H), 7.33 (t, 1H), 7.21 (t, 1H), 7.15 (t, 1H), 7.08 (d, 1H), 6.70 (d, 1H), 6.36 (m, 1H), 5.62 (br s, 2H), 4.20 (d, 2H), 4.04 (s, 3H), 3.91 (s, 3H), 1.87 (s, 3H); MS m/e 485.4 (M+H)+.

1. concentrationthen concentrated under reduced pressure
2. customThe residue was purified by preparative reverse phase HPLC