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Under control: Highly functionalized chiral annulated piperidines with eight stereocenters are efficiently obtained by means of a highly enantioselective one-pot [6+3]/[4+2] sequence. This sequence included the first enantioselective [6+3] cycloaddition of azomethine ylides with fulvenes.
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Potowski et al. (2012) studied this question.
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