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Here, we present an unprecedented formal 3 + 2 cycloaddition of para-quinone methides with vinyl epoxides/cyclopropanes to deliver a wide range of spiro4.5decanes in high efficiency and stereoselectivity. The commercial availability of the catalysts and reagents, together with the convenient procedure, makes it an attractive method in asymmetric synthesis.
Ma et al. (Fri,) studied this question.
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