Benzindoles. 21. Structures of the products of the wittig reaction in the angular benzindole series
Abstractα-Phenyl-β-(1H-benzo[g] indol-3-yl)ethylene and α-phenyl-β-(3H-benzo[e] indol-l-yl)-ethylene were obtained in the form of two geometrical isomers by reaction of 3-formyl-1H-benzo[g]- and 1-formyl-3H-benzo[e] indoles with benzylidenetriphenylphosphorane in tert-butyl alcohol containing potassium tert-butoxide. The configurations of the compounds obtained were established on the basis of data from the PMR spectra.