Arynic Condensatiopn of Ketone Enolates. 17. New General Access to Benzocyclobutene Derivatives

Article abstract of DOI:10.1021/jo00359a008

Arynic condensation of 1,2-diketone monoketal enolates appeared to be a very simple way to synthesize benzocyclobutene derivatives.X-ray diffraction and 1H NMR spectra allowed us to determine the structure of the new compounds and to propose a mechanism concerning these condensations.Finally, during this work we devised a new and easily performed two-step synthesis of 1,2-diketones.