反应详情

To a solution of tert-butyl 5-(pyrazin-2-yl)picolinate 41-3 (1.11 g, 4.32 mmol) in dichloromethane (4.5 mL) was added TFA (4.5 mL) dropwise at room temperature. The mixture was stirred for 10 hours, and then the solvents were removed by rotary evaporation. The resulting pale yellow oil was further dried under lyophilizer to afford 5-(pyrazin-2-yl)picolinic acid 41-4 in TFA salt as a pale yellow solid. MS m/z 202.1 (M+1)

1. customthe solvents were removed by rotary evaporation
2. customThe resulting pale yellow oil was further dried under lyophilizer