反应详情

Compound 74 was dissolved in DCM (5 mL) and TFA (1.5 mL) and stirred at 20° C. for 2.5 hrs. The reaction was concentrated in vacuum and purified by preparative HPLC eluting with a gradient 10% MeCN/water/0.1% TFA -50% MeCN/water/0.1% TFA to provide compound 71 (23 mg) as a yellow solid. 1H NMR (500 MHz, CD3OD) δ 9.63 (1H, s), 9.32 (1H, s), 8.68 (1H, d, J=6.1 Hz), 8.63 (1H, d, J=6.4 Hz), 7.84 (1H, s), 5.56 (1H, p, J=8.1), 4.00-4.29 (4H, br s), 3.39 (4H, t, J=5.3 Hz), 2.63 (2H, m), 2.25 (4H, m), 1.98 (2H, m) ppm; LCMS-ESI (POS), M/Z, M+1: Found 449.2.

1. concentrationThe reaction was concentrated in vacuum
2. custompurified by preparative HPLC
3. washeluting with a gradient 10% MeCN/water/0.1% TFA -50% MeCN/water/0.1% TFA