[C:1]([NH:4][C:5]1[CH:13]=[CH:12][C:8]([C:9](O)=[O:10])=[CH:7][C:6]=1[N+:14]([O-:16])=[O:15])(=[O:3])[CH3:2].C(Cl)(=O)C([Cl:20])=O.C(Cl)(Cl)Cl>CN(C=O)C>[C:1]([NH:4][C:5]1[CH:13]=[CH:12][C:8]([C:9]([Cl:20])=[O:10])=[CH:7][C:6]=1[N+:14]([O-:16])=[O:15])(=[O:3])[CH3:2]4-Acetamido-3-nitrobenzoic acid 1 (Alfa Aesar, 5.6 g, 25 mmol), oxalyl chloride (4.76 g, 38 mmol), chloroform (50 ml), DMF (few drops) were stirred at 40° C. for 3 hours. The solvent was removed in vacuo to give a yellow solid that was used in the next step without further purification.
Wird geladen…