Functionalization of methyl (R)-phenylglycinate through orthopalladation: C-Hal, C-O, C-N, and C-C bond coupling

Inorg Chem. 2009 Dec 21;48(24):11963-75. doi: 10.1021/ic901941s.

Abstract

The ortho functionalization of methyl R-phenylglycinate has been easily achieved using the known orthopalladated complex [Pd(mu-Cl){R-C(6)H(4)(CH(CO(2)Me)NH(2))-2}](2) (1) as synthetic tool. Different functional groups have been introduced at the ortho position of the aryl ring. The reaction of (R)-1 with X(2) or PhI(OAc)(2) gives XC(6)H(4)(CH(CO(2)Me)NH(2))-2 (X = I, Br, OMe, OEt) through oxidative coupling, while the reaction with CO gives an isoindolone. (R)-1 also reacts with one, two, or three alkyne molecules to give different metal-containing or metal-free heterocycles. The resulting functionalized amino esters or heterocycles retain the chirality of (R)-1, according with the values of the optical rotation and the obtained ee values ranging from 22%-87%. The X-ray structures of six representative compounds have also been determined.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Carbon / chemistry
  • Crystallography, X-Ray
  • Glycine / analogs & derivatives*
  • Glycine / chemistry
  • Halogens / chemistry
  • Models, Molecular
  • Molecular Conformation
  • Nitrogen / chemistry
  • Organometallic Compounds / chemical synthesis
  • Organometallic Compounds / chemistry*
  • Oxygen / chemistry
  • Palladium / chemistry*
  • Stereoisomerism

Substances

  • Halogens
  • Organometallic Compounds
  • methyl phenylglycine
  • Palladium
  • Carbon
  • Nitrogen
  • Oxygen
  • Glycine