[F:1][C:2]1[CH:3]=[N:4][CH:5]=[CH:6][C:7]=1[C:8]1[N:9]=[CH:10][C:11]([NH2:20])=[N:12][C:13]=1[C:14]1[CH:15]=[N:16][CH:17]=[CH:18][CH:19]=1.N1C=CC=CC=1.[C:27](Cl)(=[O:30])[CH2:28][CH3:29]>C(Cl)Cl>[F:1][C:2]1[CH:3]=[N:4][CH:5]=[CH:6][C:7]=1[C:8]1[N:9]=[CH:10][C:11]([NH:20][C:27](=[O:30])[CH2:28][CH3:29])=[N:12][C:13]=1[C:14]1[CH:15]=[N:16][CH:17]=[CH:18][CH:19]=1To a solution of 5-(3-fluoropyridin-4-yl)-6-pyridin-3-ylpyrazin-2-amine (Example 115) (150 mg, 0.56 mmol) in CH2Cl2 (5 mL) was added pyridine (1 mL), cooled at 0° C., propionyl chloride (57 mg, 0.62 mmol) was added dropwise. Upon complete addition, the ice bath was removed and the reaction continued at room temperature overnight. Then CH2Cl2 (10 mL) and aqueous NaOH 10% (10 mL) were added, the organic layer was separated, and washed with H2O and saturated NaCl. The combined organic layers were dried over Na2SO4, filtered and concentrated in vaccuo. The crude product was purified by column chromatography on silica gel, eluting with an EtOAc/hexane gradient (80-100%), yielding the target product (100 mg, 55%)
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