反应详情

To a stirred suspension of 2-(2,6-difluorophenyl)-5-(4-(piperazin-1-yl)phenyl)oxazole-4-carboxamide (0.025 g, 0.065 mmol) in DCE (2 mL) under an N2 atmosphere at room temperature was added formaldehyde 37% solution (10 uL, 0.12 mmol) followed by sodium triacetoxyborohydride (0.066 g, 0.31 mmol) and the resulting mixture stirred at room temperature for 2 hours. The reaction mixture was diluted with DCM and washed with saturated sodium bicarbonate solution. The aqueous phase was extracted with DCM and the combined organic phases dried over MgSO4 and the solvent removed in vacuo to afford 2-(2,6-difluorophenyl)-5-(4-(4-methylpiperazin-1-yl)phenyl)oxazole-4-carboxamide (0.019 g, 0.048 mmol, 72%) as a white solid. 1H NMR (CDCl3) 2.36 (3H, s), 2.57 (4H, t), 3.34 (4H, t), 5.49 (1H, br. s), 6.97 (2H, d), 7.07 (2H, t), 7.19 (1H, br. s), 7.45 (1H, m), 8.31 (2H, d). LCMS (2) Rt: 2.75 min; m/z (ES+) 399.

1. washwashed with saturated sodium bicarbonate solution
2. extractionThe aqueous phase was extracted with DCM
3. dry with materialthe combined organic phases dried over MgSO4
4. customthe solvent removed in vacuo