Combination of Novozym 435-catalyzed enantioselective hydrolysis and amidation for the preparation of optically active δ-hexadecalactone

J Oleo Sci. 2015;64(5):561-75. doi: 10.5650/jos.ess14232.

Abstract

A new enzymatic method for synthesis of enantiomerically enriched δ-hexadecalactone (3) based on the enzymatic kinetic resolution of N-methyl-5-acetoxyhexadecanamide (1) is described. A combination of lipase-catalyzed hydrolysis and amidation improved enantioselectivity. Lipase-catalyzed amidation was also investigated. Detailed screening of solvents and additive amines was performed. The addition of cyclohexylamine to lipase-catalyzed hydrolysis afforded the best results to give both enantiomers of 3 with more than 90% enantiomeric excess.

MeSH terms

  • Amides / chemistry*
  • Amines
  • Catalysis
  • Cyclohexylamines / chemistry
  • Enzymes, Immobilized
  • Fungal Proteins
  • Hydrolysis
  • Lactones / chemical synthesis*
  • Lipase / chemistry*
  • Pyrones / chemical synthesis*
  • Solvents
  • Stereoisomerism

Substances

  • Amides
  • Amines
  • Cyclohexylamines
  • Enzymes, Immobilized
  • Fungal Proteins
  • Lactones
  • Pyrones
  • Solvents
  • Novozyme 435
  • Lipase