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A new approach to directly access bicyclo2.1.1hexanes (BCHs) from easily prepared enol silyl ethers and bicyclo1.1.0butanes (BCBs) through formal 2π+2σ cycloaddition was developed involving two-electron mediated process promoted by commercially available Lewis acids. This new reaction tolerated a wide range of enol silyl ethers and BCBs. In addition, a scale-up experiment and the synthetic transformations of the cycloadducts further highlighted the synthetic utility.
Li et al. (Thu,) studied this question.
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