... Our syntheses of benzocyclobutene derivatives should, we feel, be of considerable value to workers interested in benzocyclobutene chemistry. Both (18) R. Levine and W. C. Fernelius, Chem. Reo., 64, 449 (1954). (19) R. Mozingo, D. E. Wolf, S. A. Harris, and K. Folkem, J . Am. ...