Asymmetric and Geometry-Selective α-Alkenylation of α-Amino Acids

Hossay Abas, Josep Mas-Roselló, Mostafa Mahmoud Amer, Derek J. Durand, Robin R. Groleau, Natalie Fey, Jonathan Clayden*

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)

7 Citations (Scopus)
198 Downloads (Pure)

Abstract

Both E- and Z-N′-alkenyl urea derivatives of imidazolidinones may be formed selectively from enantiopure α-amino acids. Generation of their enolate derivatives in the presence of K + and [18]crown-6 induces intramolecular migration of the alkenyl group from N′ to Cα with retention of double bond geometry. DFT calculations indicate a partially concerted substitution mechanism. Hydrolysis of the enantiopure products under acid conditions reveals quaternary α-alkenyl amino acids with stereodivergent control of both absolute configuration and double bond geometry.

Original languageEnglish
Pages (from-to)2418-2422
Number of pages5
JournalAngewandte Chemie - International Edition
Volume58
Issue number8
Early online date2 Jan 2019
DOIs
Publication statusPublished - 18 Feb 2019

Keywords

  • DFT calculations
  • quaternary amino acids
  • rearrangement
  • stereodivergence
  • α-alkenylation

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