C(OC([NH:8][C:9]([NH:25]C(OC(C)(C)C)=O)=[N:10][C:11]1[CH:16]=[CH:15][CH:14]=[C:13]([C:17]2[CH:22]=[C:21]([O:23][CH3:24])[CH:20]=[CH:19][N:18]=2)[CH:12]=1)=O)(C)(C)C.[ClH:33]>ClCCl.O1CCOCC1>[ClH:33].[ClH:33].[CH3:24][O:23][C:21]1[CH:20]=[CH:19][N:18]=[C:17]([C:13]2[CH:12]=[C:11]([NH:10][C:9]([NH2:25])=[NH:8])[CH:16]=[CH:15][CH:14]=2)[CH:22]=1To a solution of N,N′-bis(tert-butoxycarbonyl)-N″-(3-(4-methoxypyridin-2-yl)phenyl)guanidine (200 mg) in dichloromethane (2 ml) was added a solution of hydrogen chloride in 1,4-dioxane (4N, 4 ml), and the mixture was stirred at room temperature for 24 hours. The solvent was evaporated under reduced pressure. To the residue was added 5% ethanol in ethyl acetate (100 ml), and the precipitate was collected by filtration and dried under reduced pressure to give 3-(4-methoxypyridin-2-yl)phenylguanidine dihydrochloride (120 mg).
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