title: Synthesis and reactivity of a novel class of long-lived ammonium ylides: derivatives of benzo[b]pyrrolo[2,1-f][1.6]naphthyridine.
abstract: Reaction of 10-cyanotetrahydrobenzo[b][1,6]naphthyridines (1-6) with activated alkynes affords stable benzo[b]pyrrolo[2,1-f][1,6]naphthyridine-4-ium ylides (7-14) in moderate yields. A proposed mechanism for their formation consists of a new tandem multistage process.
authors.affiliation: Organic Chemistry Department of the Russian Peoples Friendship University, Moscow, Russia.lvoskressensky@sci.pfu.edu.ru
authors.forename: Leonid G
authors.initials: LG
authors.lastname: Voskressensky
authors.forename: Ilya V
authors.initials: IV
authors.lastname: Vorobiev
authors.forename: Tatyana N
authors.initials: TN
authors.lastname: Borisova
authors.forename: Alexey V
authors.initials: AV
authors.lastname: Varlamov