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The domino 1,4-addition/carbocyclization/functionalization reaction of Michael acceptor 3 with mixed copper/zinc reagents allows the totally diastereoselective formation of 3,4-disubstituted-3-carbomethoxypyrrolidines in a three-component one-pot sequence. (© Wiley-VCH Verlag GmbH, 69451 Weinheim, Germany, 2002)
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Dénès et al. (2002) studied this question.
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