Remote stereocenter discrimination in the enzymatic resolution of piperidine-2-ethanol. Short enantioselective synthesis of sedamine and allosedamine

J Org Chem. 2003 Nov 28;68(24):9525-7. doi: 10.1021/jo035215g.

Abstract

Kinetic resolution of N-Boc-piperidine-2-ethanol (2), a case of remote stereocenter discrimination, was accomplished by sequential transesterification mediated by two enzymes, Lipase PS and porcine pancreatic lipase, showing opposite enantioselectivity. The gram-scale availability of the two enantiomeric N-Boc alcohols 2a (R) and 2c (S) enlarges their synthetic exploitation for the enantioselective preparation of piperidine alkaloids. As an example, the convenient three-step synthesis of both the enantiomers of sedamine and allosedamine is described.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Acetylation
  • Alkaloids / chemical synthesis*
  • Alkaloids / chemistry
  • Alkaloids / metabolism
  • Animals
  • Kinetics
  • Lipase / chemistry
  • Lipase / metabolism
  • Models, Chemical
  • Molecular Structure
  • Piperidines / chemical synthesis*
  • Piperidines / chemistry
  • Piperidines / metabolism
  • Stereoisomerism

Substances

  • Alkaloids
  • N-Boc-piperidine-2-ethanol
  • Piperidines
  • sedamine
  • sedridine
  • Lipase