1-BROMOBICYCLOBUTANES AND STRONG BASES: PRODUCTS AND MECHANISM
Treatment of the bromobicyclobutanes 4a - c with LDA led to the formation of the 1,2,3-butatrienes 6 which were isomerized by excess base to the alkynes 8.Reaction of 4c with LDA afforded 8d, indicating that bicyclobut-1(3)-ene 5 was not an intermediate.