反应详情

To a stirred solution of 3-amino-6-bromo-5-trifluoromethyl-pyrazine-2-carboxylic acid (Intermediate 2) (100 mg, 0.350 mmol) in dry NMP (2 ml) was added NEt3 (0.097 ml, 0.699 mmol) followed by 3-(trifluoromethyl)-1H-pyrazol-5-amine (48.0 mg, 0.318 mmol). The mixture was stirred at RT for 5 minutes, before treating with HATU (133 mg, 0.350 mmol). The resulting orange solution was stirred at RT for 10 minutes and then partitioned between EtOAc (50 ml) and 1M NaOH (30 ml). The organic portion was separated and washed with 1M NaOH (20 ml), water (20 ml), dried (MgSO4) and concentrated in vacuo. Purification of the crude residue by chromatography on silica eluting with iso-hexane/EtOAc (gradient of 0 to 50% EtOAc) afforded the title compound as a yellow solid.

1. stirringThe resulting orange solution was stirred at RT for 10 minutes
2. custompartitioned between EtOAc (50 ml) and 1M NaOH (30 ml)
3. customThe organic portion was separated
4. washwashed with 1M NaOH (20 ml), water (20 ml)
5. dry with materialdried (MgSO4)
6. concentrationconcentrated in vacuo
7. customPurification of the crude residue by chromatography on silica eluting with iso-hexane/EtOAc (gradient of 0 to 50% EtOAc)