Facile synthesis of plasmalogens via Barbier-type reactions of vinyl dioxanes and vinyl dioxolanes with alkyl halides in LiDBB solution

J Org Chem. 2002 Sep 6;67(18):6503-8. doi: 10.1021/jo025640u.

Abstract

Plasmalogens (i.e. plasmenylcholines or plasmenylethanolamines) are a biologically important class of glycerophospholipids that have been difficult to synthesize due to the presence of an acid and oxidatively labile (Z)-vinyl ether substituent at the sn-1 position and a base-labile sn-2 acyl substituent that easily migrates during silica gel purification. We report two facile synthetic methods for the preparation of racemic plasmenylcholines via a tandem reductive vinyl dioxane/dioxolane ring opening and alkyliodide coupling process that proceeds in a single pot reaction. The key step in the formation of (Z)-vinyl ether precursors for the production of plasmenylcholines is accomplished using LiDBB under Barbier-type conditions to give the corresponding TBDMS-protected 1-O-Z'-vinylglycerol intermediate in moderate yields. This pathway is the most direct synthetic route for the formation of plasmenylcholines to date, requiring a total of six transformations from acrolein and glycerol or solketal as inexpensive starting materials, to generate glycerophosphocholine-type plasmalogens in 4% overall yield.

Publication types

  • Research Support, U.S. Gov't, P.H.S.

MeSH terms

  • Catalysis
  • Combinatorial Chemistry Techniques*
  • Dioxanes / chemistry*
  • Dioxolanes / chemistry*
  • Glycerol / chemistry
  • Magnetic Resonance Spectroscopy
  • Molecular Structure
  • Plasmalogens / chemical synthesis*
  • Stereoisomerism
  • Vinyl Compounds / chemistry*

Substances

  • Dioxanes
  • Dioxolanes
  • Plasmalogens
  • Vinyl Compounds
  • choline plasmalogens
  • Glycerol