The first palladium-catalyzed highly regioselective [3 + 2] cycloaddition reactions of alkylidenecyclopropa[b]naphthalenes 1 with alkenes or alkynes is presented, providing an efficient method for the synthesis of 1(3)-alkylidene-2,3-dihydro-1H-benzo[f]indenes or 1-alkylidene-1H-benzo[f]indenes under mild conditions.
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Chen et al. (2008) studied this question.
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