M. Ceylan et al., ATTEMPTED SYNTHESIS OF CYCLOPENTA-1,2-DIENE AND WURTZ-LIKE CONDENSATION PRODUCTS IN THE REACTION OF 2,3-DIBROMOCYCLOALKENES WITH ZINC, Journal of chemical research. Synopses, (3), 1997, pp. 70-71
Fluoride ion-promoted elimination of 2-bromo-3-trimethylsilylcyclopent
ene 5 and the reaction of five-, six- and seven-membered 2,3-dibromocy
cloalkenes with zinc gave Wurtz-like dimeric products instead of the e
xpected cyclic allenes.