4.4 Article

Catalytic Ring Expansion Adventures

Journal

SYNLETT
Volume 24, Issue 7, Pages 787-803

Publisher

GEORG THIEME VERLAG KG
DOI: 10.1055/s-0032-1318326

Keywords

ring expansion; catalysis; strained rings; thiiranes; aziridines; oxiranes; oxetanes

Funding

  1. National Science Foundation [CHE-0848324]
  2. Division Of Chemistry
  3. Direct For Mathematical & Physical Scien [1266365] Funding Source: National Science Foundation

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This account summarizes the Njardarson group ring expansion journey from early vinyl oxirane explorations to the latest vinyl oxetane ring expansion discoveries. The evolution of the program and incredible success of Cu(hfacac)(2) as catalyst is detailed. Application of these new ring expansion reactions to natural product, pharmaceutical and commodity chemical targets is discussed as well as our intriguing mechanistic journey and interesting entry into the world of chiral counterion catalysis.

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