New entries in Lewis acid-Lewis base bifunctional asymmetric catalyst: catalytic enantioselective Reissert reaction of pyridine derivatives

J Am Chem Soc. 2004 Sep 29;126(38):11808-9. doi: 10.1021/ja045966f.

Abstract

The first catalytic enantioselective Reissert reaction of pyridine derivatives that affords products with excellent regio- and enantioselectivity is described. The key for success is the development of new Lewis acid-Lewis base bifunctional asymmetric catalysts containing an aluminum as a Lewis acid and sulfoxides or phosphine sulfides as a Lewis base. These reactions are useful for the synthesis of a variety of chiral piperidine subunits, and catalytic enantioselective formal synthesis of CP-293,019, a selective D4 receptor antagonist, was achieved. Preliminary mechanistic studies indicated that both sulfoxides and phosphine sulfides can activate TMSCN as a Lewis base. In addition, the sulfoxides with appropriate stereochemistry might stabilize a highly enantioselective bimetallic complex (a presumed active catalyst) through internal coordination to aluminum.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Aluminum / chemistry
  • Catalysis
  • Isoquinolines / chemistry*
  • Naphthols / chemistry
  • Oxides / chemistry
  • Phosphines / chemistry
  • Piperidines / chemical synthesis*
  • Piperidines / chemistry
  • Pyrazines / chemical synthesis
  • Pyridines / chemical synthesis*
  • Pyridines / chemistry
  • Pyrimidines / chemical synthesis
  • Quinolines / chemistry*
  • Stereoisomerism

Substances

  • BINOL, naphthol
  • CP 293019
  • Isoquinolines
  • Naphthols
  • Oxides
  • Phosphines
  • Piperidines
  • Pyrazines
  • Pyridines
  • Pyrimidines
  • Quinolines
  • Aluminum
  • phosphine