A convenient synthetic route to benz[cd]azulenes: versatile ligands with the potential to bind metals in an eta5, eta6, or eta7 fashion.
A facile method for preparing the 2H-benz[cd]azulene system, based upon an elaboration of the guaiazulene framework, is presented. Aerial oxidation to the corresponding 8-(2-propylidene)-benz[cd]azulene, and also cycloaddition reactions with tetracyanoethylene (TCNE), are described. The first X-ray crystal structure of a 2H-benz[cd]azulene, as an eta6-coordinated Cr(CO)3 complex, is reported.
Balduzzi
Sonya
S
Department of Chemistry, McMaster University, Hamilton, Ontario L8S 4M1, Canada.
Müller-Bunz
Helge
H
McGlinchey
Michael J
MJ