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  • Title: Efficient stereoselective syntheses of cyclic amino acids via Michael-induced ring-closing reactions.
    Author: Pohlman M, Kazmaier U.
    Journal: Org Lett; 2003 Jul 24; 5(15):2631-3. PubMed ID: 12868876.
    Abstract:
    [reaction: see text] Zn-chelated glycine ester enolates are highly efficient nucleophiles for the synthesis of trans-methoxycarbonylcyclopropyl- and cyclobutylglycines by domino sequences of Michael additions and subsequent ring closures. They react to give the anti isomers with high yields and excellent diastereoselectivities.
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