The title compound was synthesized either by introduction of another pyridine ring into 3-(2-pyridyl)-1,2,3,8-tetrahydroazulen-1-one or by Stille and Negishi double cross-coupling reactions of 1,3-dihaloazulenes with the corresponding 2-pyridyl reagents.
A Divergent Method for Preparing 1-Aryl- and 1,3-Diarylazulenes from Ethyl 3-(Cyclohepta-1,3,5-trien-1-yl)-3-oxopropionate