A number of 3, 4-benzo-9-bromo-2-oxabicyclo [3.3. 1] nonanes (9 ah) are synthesized in almost quantitative yields by regioselective heterocyclization of ortho-cyclohexenyl phenols (8 ah). The structures of 3, 4-benzo-9-bromo-2-oxabicyclo [3.3. 1] nonane 9 have been unambiguously settled by the synthesis of 9-chloromercuri-3, 4-(4'-methoxybenzo)-2- oxabicyclo [3.3. 1] nonane 13, which has an X-ray determined structure, and by converting ...
