Kim JH, Chung Y, Jeon H, Lee S, Kim S. Stereoselective Asymmetric Synthesis of Pyrrolidines with Vicinal Stereocenters Using a Memory of Chirality-Assisted Intramolecular S
N2' Reaction.
Org Lett 2020;
22:3989-3992. [PMID:
32367718 DOI:
10.1021/acs.orglett.0c01307]
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Abstract
An efficient strategy for the asymmetric synthesis of pyrrolidines with vicinal quaternary-tertiary or quaternary-quaternary stereocenters was established. A "memory of chirality" intramolecular SN2' reaction of α-amino ester enolates with allylic halides provided a functionalized pyrrolidine with excellent dia- and enantioselectivity. This method features construction of stereochemically enriched pyrrolidines in a single operation through the influence of a single chiral center presented in substrates.
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