Compounds llc, 12, and 13 have been synthesized as potential precursors for the 2- substituted bicyclo-[3.3. l] non-1 (2)-en-3-ones 5 (R= Ph and t-Bu). The lactone 34 and its derivatives 32 have also been synthesized as potential precursors for the parent bicyclo [3.3. 1] enone 1.