Journal of the American Chemical Society, Vol.120, No.33, 8315-8318, 1998
Benzocyclohex-1-en-3-yne at high temperature
Generation of benzocyclohex-1-en-3-yne in two ways leads to naphthalene and methyleneindene (benzofulvene). Labeling studies favor a multistep mechanism involving an initial electrocyclic ring opening, and carbene-alkene interconversions.