Synthesis and photochemical rearrangement of 1-allyl-1,8-dihydropyrrolo-[2,3-b]indoles
Abstract
The 1,8-dihydropyrrolo[2,3-b]indole ring system, readily prepared in three steps from indole-3-carbaldehyde, behaves as an isolated pyrrole in that its 1-allyl derivatives (6),(9), and (11) undergo photochemical rearrangement to the 2H-isomers (8),(10), and (12) respectively.