4.7 Article

Enamides and dienamides in phosphoric acid-catalysed enantioselective cycloadditions for the synthesis of chiral amines

Journal

CHEMICAL COMMUNICATIONS
Volume 57, Issue 34, Pages 4089-4105

Publisher

ROYAL SOC CHEMISTRY
DOI: 10.1039/d1cc00590a

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Funding

  1. CNRS
  2. Saclay University

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Chiral substituted cyclic amines are important in organic synthesis, with stable and easy to synthesize enamides and dienamides serving as versatile building blocks for the preparation of chiral amines. The exceptional synergy between these synthetic synthons and chiral phosphoric acid catalysts has been successfully utilized to develop formal cycloadditions with high enantioselectivity, allowing access to chiral cyclic amines with varying ring sizes.
Chiral substituted cyclic amines are ubiquitous among biologically active molecules and natural products and are valuable intermediates in organic synthesis. Stable and easy to synthesize enamides and dienamides are versatile building blocks for the preparation of chiral amines. The exceptional synergy displayed between these synthetic synthons and chiral phosphoric acid catalysts has successfully been harnessed to develop straightforward formal cycloadditions exhibiting notably high enantiocontrol. This feature article showcases the remarkable versatility of these cycloadditions to access chiral cyclic amines with different ring sizes ranging from 5- to 7-membered rings, with an emphasis on biologically active natural products.

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