Green Synthesis and Catalysis (Feb 2022)
Palladium-catalyzed cyclobutenation of aryl chlorides with norbornenes
Abstract
A palladium-catalyzed cyclobutenation of readily available aryl chlorides and norbornene derivatives is reported here. Under the optimum reaction conditions, various valuable benzocyclobutene derivatives were prepared efficiently via Heck-Catellani reaction. The key is the employment of bulky t-Bu3PHBF4 phosphine ligand which promoted C–C reductive elimination from the palladacycle.