1257821-12-7Relevant articles and documents
Cyclopenta[a]quinolizine: A novel pseudoazulene with a bridgehead nitrogen atom
Gormay, Pavel V.,Rybakov, Victor B.,Babaev, Eugene V.
experimental part, p. 5364 - 5368 (2010/11/18)
Cyclopenta[a]quinolizine, a novel tricyclic pseudoazulene, was prepared by reaction of cyclopentadienyllithium with oxazolo[3,2-a]pyridimum or substituted pyridinium salts. Structural analysis (X-ray analysis, NMR and UV spectroscopy) and DFT calculations confirm its highly dipolar nature (due to derealization of the negative charge around the five-membered ring) combined with partial localization of bonds in both six-membered rings.