反应详情

A solution of 4-{6-[3-(4-tert-butyl-benzoylamino)-2-methyl-phenyl]-4-methyl-3-oxo-3,4-dihydro-pyrazin-2-ylamino}-benzoic acid (7) (80 mg; 0.16 mmol), benzotriazol-1-yloxytris(dimethylamino)phosphonium hexafluorophosphate (69 mg; 0.16 mmol), N,N-diisopropylethylamine (0.09 mL; 0.48 mmol), and N,N-dimethylformamide (1 mL) was stirred at room temperature for 0.5 hr. N-Methylpiperazine (80 mg; 0.8 mmol) was added and the mixture was stirred at room temperature for 16 hr. Water (30 mL) was added and the mixture was extracted with ethyl acetate (3×60 mL). The combined organic extracts were washed with water (2×30 mL) and brine (1×30 mL), dried over magnesium sulfate, and evaporated under reduced pressure. The residue was slurried with diethyl ether and filtered to give 4-tert-butyl-N-(2-methyl-3-{4-methyl-6-[4-(4-methyl-piperazine-1-carbonyl)-phenylamino]-5-oxo-4,5-dihydro-pyrazin-2-yl}-phenyl)-benzamide (8) as a cream solid (50 mg), MS 593.35 (M+H)

1. extractionthe mixture was extracted with ethyl acetate (3×60 mL)
2. washThe combined organic extracts were washed with water (2×30 mL) and brine (1×30 mL)
3. dry with materialdried over magnesium sulfate
4. customevaporated under reduced pressure
5. filtrationfiltered