Acetyl chloride → 1-(4-(3-(4-(pyridin-2-ylamino)phenoxy)pyrazin-2-yl)-5,6-dihydropyridin-1(2H)-yl)ethanone
Reaction equation
[N:1]1[CH:6]=[CH:5][CH:4]=[CH:3][C:2]=1[NH:7][C:8]1[CH:33]=[CH:32][C:11]([O:12][C:13]2[C:14]([C:19]3[CH2:24][CH2:23][N:22]([C:25]([O:27]C(C)(C)C)=O)[CH2:21][CH:20]=3)=[N:15][CH:16]=[CH:17][N:18]=2)=[CH:10][CH:9]=1.[C:34](Cl)(=O)C>>[N:1]1[CH:6]=[CH:5][CH:4]=[CH:3][C:2]=1[NH:7][C:8]1[CH:9]=[CH:10][C:11]([O:12][C:13]2[C:14]([C:19]3[CH2:24][CH2:23][N:22]([C:25](=[O:27])[CH3:34])[CH2:21][CH:20]=3)=[N:15][CH:16]=[CH:17][N:18]=2)=[CH:32][CH:33]=1Participants
3
Procedure
During a resynthesis of Example 279 (Step 1) an incomplete hydrogenation resulted in a small fraction of tert-butyl 4-(3-(4-(pyridin-2-ylamino)phenoxy)pyrazin-2-yl)-5,6-dihydropyridine-1(2H)-carboxylate (Example 278) to be carried forward through Example 279 (Step 2), which was subsequently treated in similar fashion using acetyl chloride. The impurity was separated from the major product by SFC using MeOH (1% diethyl amine) to give 1-(4-(3-(4-(pyridin-2-ylamino)phenoxy)pyrazin-2-yl)-5,6-dihydropyridin-1(2H)-yl)ethanone as a white solid. MS (ESI, pos. ion) m/z: 388.1 (M+1). IC50 (uM) 0.00234.