A formal [3 + 3]-cycloaddition of enoldiazoacetates with donor-acceptor cyclopropanes was realized by the combination of a Lewis acid-catalyzed diastereoselective [3 + 2]-cycloaddition and a subsequent rhodium-catalyzed chemoselective ring expansion. This tandem transformation provides an efficient approach to highly functionalized cyclohexenes.
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Cheng et al. (2015) studied this question.
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