S. Mahboobi et S. Kuhr, SYNTHESIS OF CARBAZOLE DERIVATIVES .2. C- 2-SUBSTITUTED INDOLES AS INTERMEDIATES OF PYRROLINO[3,4-C]CARBAZOLES, Archiv der pharmazie, 328(1), 1995, pp. 45-52
Starting from the indole derivatives 4, 7 and 15 Grignard reaction, nu
cleophilic substitution at the pertinent dithian, and Wittig reaction
afford pre paratively useful side chains. By intramolecular Michael re
action the pertinent compounds lead to the pyrrolidino- and pyrrolino[
3,4-c]carbazoles 32 and 33, respectively.