Allenes. Part 34. Reactions of methylindoles and 2,5-dimethylpyrrole with allenic carbenes
Abstract
1-Bromoallenes give allenic carbenes under basic conditions, which react with methylindoles to give alkenylquinolines by ring expansion and alkynyl- and allenyl-3H-indoles. Under the same conditions 2,5-dimethylpyrrole is converted into a 3-alkenyl-2,6-dimethylpyridine.