Reaktivitäut und reaktionswege von methylsubstituierten bisindolylcarbenium-ionen

Methyl substituted bisindolylcarbenium ions 1 react with some O- and C-nucleophiles regioselectively. The cations 1b, 1c yield with hydroxide ions the tetraindolyldimethyl ether 4 and with methoxide ions the bisin-dolylmethoxymethanes 5. Compounds 1a, 1b, 1c react with several methylindoles to isomeric bis- and trisin-dolylmethanes. An electrophilic reactivity order of cations 1 can be derived supporting on the experimental results.

Elektronenstoß-induzierte massenspektrometrische Fragmentierung von 2,2′-Bisindolylmethoxy- und Trisindolyl-methanen

Reactions of 1-isopropyl-3-methyl- and 2,3-dimethylindoles with triethyl orthoformate: New trisindolylmethanes

Indoles 1 and 2 react with triethyl orthoformate under proton–catalyzed conditions to form trisindolylmethanes. The regioisomer distribution of the products is controlled by steric and electronic factors.