[Biologically active N-Mannich bases of isatin-3-(phenyl)-imines (author's transl)].

By the condensation of isatin and 5-nitroisatin with substituted aromatic amines, isatin- and 5-nitroisatin-3-(phenyl)-imines (azomethines) are formed which are converted into N-Mannich-bases by aminomethylation and may be formulated as azomethines with E configuration. A biotest of Lepidium sativum L. was used to prove mitodepressive properties. Some compounds showed a significant growth-inhibiting activity. It was found that a change in activity is produced by condensation on the carbon atom in position 3 and by aminomethylation on the nitrogen atom in the isatin nucleus.