Flexible strategy for syntheses of spirooxindoles using palladium-catalyzed carbosilylation and Sakurai-type cyclization

Org Lett. 2011 Apr 1;13(7):1828-31. doi: 10.1021/ol2003447. Epub 2011 Mar 8.

Abstract

The intramolecular carbosilylation of N-[2-(1,3-butenyl)aryl]carbamoyl chloride has been investigated. The reaction with hexamethyldisilane proceeds smoothly in the presence of a catalytic amount of [Pd(η(3)-allyl)Cl](2) to give oxindoles with an allylsilane functional group in good yield. The subsequent subjection of the products to a Sakurai-type reaction provides more advanced tricyclic spirooxindoles by controlling the stereochemistry of three contiguous stereogenic centers.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Catalysis
  • Cyclization
  • Indoles / chemical synthesis*
  • Molecular Structure
  • Oxindoles
  • Palladium / chemistry*
  • Spiro Compounds / chemical synthesis*

Substances

  • Indoles
  • Oxindoles
  • Spiro Compounds
  • 2-oxindole
  • Palladium