反应详情

To methyl 4-(3-amino-6-(4-oxocyclohexyl)pyrazin-2-yl)-2-fluorobenzoate (300 mg, 0.874 mmol) was added MeOH (4 mL), phenylmethanamine (112 mg, 1.048 mmol) and last dry 4 Å molecular sieves. The reaction was stirred at room temperature for 16 h. Then NaBH4 (165 mg, 4.37 mmol) was added and stirred at room temperature for 2 h followed by LCMS. To the reaction was added 150 mL of ethyl acetate, washed with saturated sodium bicarbonate, water (2×), saturated salt solution, dried over sodium sulfate, filtered and concentrated to residue to give 352 mg of the desired product in 2:1 trans to cis ratio, used as is (93%). LCMS (m/z): 435.3 (MH+), 0.68 min and 0.72 min.

1. customlast dry 4 Å molecular sieves
2. stirringstirred at room temperature for 2 h
3. washwashed with saturated sodium bicarbonate, water (2×), saturated salt solution
4. dry with materialdried over sodium sulfate
5. filtrationfiltered
6. concentrationconcentrated to residue