Polyaza-Cavity Shaped Molecules. 14. Annelated 2-(2'-Pyridyl)indoles, 2,2'-Biindoles, and Related Systems

Article abstract of DOI:10.1021/jo00268a040

The Fisher indole synthesis has been employed with a series of α-keto-2,3-cycloalkenopyridines to provide 3,3'-polymethylene bridged derivatives of 2-(2'-pyridyl)indole.The same reaction with α,α'-diketo<2,3:5,6>dicycloalkenopyridines provides bis-annelat