[NH2:1][C:2]1[C:7]([NH:8][C:9](=[O:18])[O:10][CH2:11][C:12]2[CH:17]=[CH:16][CH:15]=[CH:14][CH:13]=2)=[CH:6][CH:5]=[CH:4][N+:3]=1[O-].[CH3:20][O:21][C:22]([C:24]#[C:25][C:26]([O:28]C)=O)=[O:23].C1(C)C=CC(S(O)(=O)=[O:37])=CC=1>C(Cl)(Cl)Cl>[CH2:11]([O:10][C:9]([NH:8][C:7]1[C:2]2=[N:1][C:24]([C:22]([O:21][CH3:20])=[O:23])=[C:25]([OH:37])[C:26](=[O:28])[N:3]2[CH:4]=[CH:5][CH:6]=1)=[O:18])[C:12]1[CH:17]=[CH:16][CH:15]=[CH:14][CH:13]=1To a solution of benzyl (2-amino-1-oxidopyridin-3-yl)carbamate in chloroform (filtered over alumina) was added DMAD and p-toluenesulfonic acid. The suspension was stirred at 70° C. for 12 hours. The solvent was then removed under reduced pressure and to the residue was added MeOH. The solid was filtered, washed with MeOH and dried under vacuum.
Wird geladen…