4.5 Article

In Situ Generation Technology of -Butoxycarbonyliodonium Ylide: A Hypervalent Analogue of the Darzens Reagent

Journal

EUROPEAN JOURNAL OF ORGANIC CHEMISTRY
Volume 2013, Issue 18, Pages 3662-3666

Publisher

WILEY-V C H VERLAG GMBH
DOI: 10.1002/ejoc.201300413

Keywords

Iodine; Hypervalent compounds; Ylides; Small ring systems

Funding

  1. Ministry of Education, Culture, Sciences, and Technology (MEXT), Japan
  2. Grants-in-Aid for Scientific Research [23390006, 25460016] Funding Source: KAKEN

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An ester exchange reaction of -butoxy--acyloxyvinyl-3-iodane with lithium bases (ROLi and nBuLi) efficiently generates highly labile monoester iodonium ylide at low temperature. The iodonium ylide generated in situ cleanly undergoes Darzens condensation with aromatic aldehydes to afford trans-epoxy ester selectively.

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