4.8 Article

A Counterion-Directed Approach to the Diels-Alder Paradigm: Cascade Synthesis of Tricyclic Fused Cyclopropanes

Journal

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 55, Issue 44, Pages 13813-13817

Publisher

WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201608534

Keywords

cations; cycloadditions; diastereoselectivity; density-functional calculations; heterocycles

Funding

  1. European Research Council [259056]
  2. Diamond Light Source [MT7768]
  3. EPSRC [EP/I003398/1, EP/K014668/1]
  4. National Science Foundation [OCI-1053575]
  5. EPSRC [EP/K014668/1, EP/I003398/1] Funding Source: UKRI
  6. Engineering and Physical Sciences Research Council [1378325, EP/K014668/1, EP/I003398/1] Funding Source: researchfish
  7. European Research Council (ERC) [259056] Funding Source: European Research Council (ERC)

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An approach to the intramolecular Diels-Alder reaction has led to a cascade synthesis of complex carbocycles composed of three fused rings and up to five stereocenters with complete stereocontrol. Computational analysis reveals that the reaction proceeds bya Michael/Michael/cyclopropanation/epimerization cascade in which size and coordination of the counterion is key.

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