Mesoionische Sechsringheterocyclen, XVI Syntheses von 2 a, 5 a-Diaza-acenaphthylen Mesoionen

摘要

Reaction of 7-azaindole with activated malonates (1) results in the formation of the tricyclic mesoionic diaza-acenaphthylene compounds2. Hydrogenation of2a with platin as catalyst leads to the saturated betaine4. The structure assignment was established by1H-13C-NMR shift correlation and decoupling experiments.