Protolytk Cleavage of Tricyclo[32.O.@'Ibept-3eneAcidolyscs of the title compound 9 were performed in aqueous dioxane and in acetic acid to give eight alcohols (5-8,lO-13) among which bicyclo[3.1 .I]hept-2-en-exo-6-01 (13) was novel.Comparison with independent routes to the various cationic intermediates reveals that the double bond and the cyclopropane ring of 9 react at similar rates and with high regioselectivity. Protonation occurs preferentially, if not exclusively, at C-4 and C-7. 551 -553 (1988)