反应详情

To a solution of the product of Step F (12.54 g, 24.8 mmol, 1 eq) in DCM (100 mL) at rt was added TFA (20 mL, 261 mmol, 10.6 eq). After 1 hr, the solution was concentrated. 3 M NaOH was added and the solution extracted with DCM, the organics combined, dried over MgSO4, and concentrated to afford the title compound of Step G. 1H NMR (CHLOROFORM-d) δ: 8.72 (s, 1H), 7.69 (br. s., 1H), 5.07 (d, J=4.9 Hz, 1H), 4.71-4.90 (m, 2H), 3.84-4.03 (m, 3H), 3.58-3.71 (m, 2H), 3.09-3.20 (m, 2H), 2.14-2.41 (m, 3H), 1.99-2.13 (m, 1H), 1.65-1.75 (m, 1H), 1.43-1.58 (m, 1H). Calculated for C17H20F3N3O2: 356.2 (M+1). found: 356.3.

1. concentrationthe solution was concentrated
2. addition3 M NaOH was added
3. extractionthe solution extracted with DCM
4. dry with materialdried over MgSO4
5. concentrationconcentrated