C(N(CC)CC)C.C(O[C:12](=[O:14])[CH3:13])(=O)C.[NH2:15][C:16]1[C:17]([NH:31][CH2:32][CH:33]2[CH2:38][CH2:37][N:36](C(OC(C)(C)C)=O)[CH2:35][CH2:34]2)=[CH:18][C:19]([NH:22][C:23]2[CH:28]=[N:27][C:26]([C:29]#[N:30])=[CH:25][N:24]=2)=[N:20][CH:21]=1.CC1C=CC(S(O)(=O)=O)=CC=1>CN(C=O)C>[C:29]([C:26]1[N:27]=[CH:28][C:23]([NH:22][C:19]2[N:20]=[CH:21][C:16]([NH:15][C:12](=[O:14])[CH3:13])=[C:17]([NH:31][CH2:32][CH:33]3[CH2:38][CH2:37][NH:36][CH2:35][CH2:34]3)[CH:18]=2)=[N:24][CH:25]=1)#[N:30]Triethylamine (11 μL, 0.082 mmol) and acetic anhydride (8 μL, 0.082 mmol) were added to a solution of tert-butyl 4-((5-amino-2-(5-cyanopyrazin-2-ylamino)-pyridin-4-ylamino)-methyl)-piperidine-1-carboxylate (29 mg, 0.068 mmol) in DMF (1 mL) at 0° C. After 2 hours, the mixture was loaded onto a MP-TsOH SPE cartridge, and eluted with 2M ammonia in methanol. The basic fractions were combined and concentrated. Purified by preparative HPLC gave N-(6-(5-cyanopyrazin-2-ylamino)-4-(piperidin-4-ylmethylamino)pyridin-3-yl)acetamide (7.4 mg, 32%).
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