Synthese von Carbazolderivaten, 2. Mitt.: 2-Substituierte Indole als Zwischenprodukte von Pyrrolino[3,4-c]carbazolen

Synthesis of Carbazole Derivatives, II: C-2-substituted Indoles as Intermediates of Pyrrolino[3,4-c]carbazoles Starting from the indole derivatives 4, 7 and 15 Grignard reaction, nucleophilic substitution at the pertinent dithian, and Wittig reaction afford preparatively useful side chains. By intramolecular Michael reaction the pertinent compounds lead to the pyrrolidino- and pyrrolino[3,4-c]carbazoles 32 and 33 , respectively.