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Starting from Boc‐activated diketopiperazines, original bicyclic derivatives of trans‐ and cis‐2‐aminocyclopentanecarboxylic acid were prepared by using two stereospecific tandem reactions. One of them is a tandem transannular rearrangement of activated lactams/alkylation process leading to the stereoselective synthesis of suitably chiral pyrrolidine‐2,4‐diones, allowing subsequent Michael‐initiated ring closure, a simple and concise route to original multifunctionalized alicyclic β‐amino esters.
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Coursindel et al. (2011) studied this question.
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