Enantioselective radiosynthesis of positron emission tomography (PET) tracers containing [¹⁸F]fluorohydrins

J Am Chem Soc. 2014 Apr 9;136(14):5291-4. doi: 10.1021/ja5025645. Epub 2014 Mar 31.

Abstract

Herein, we describe an operationally straightforward radiosynthesis of a chiral transition metal fluoride catalyst, [(18)F](salen)CoF, and its use for late-stage enantioselective aliphatic radiofluorination. We demonstrate the utility of the method by preparing single enantiomer experimental and clinically validated PET tracers that contain base-sensitive functional groups, epimerizable stereocenters, and nitrogen-rich motifs. Unlike the conventional radiosyntheses of these targets with [(18)F]KF, labeling with (salen)CoF is possible in the last step and under exceptionally mild conditions. These results constitute a rare example of a nucleophilic radiofluorination using a transition metal fluoride and highlight the potential of such reagents to enhance traditional methods for labeling aliphatic hydrocarbons.

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, Non-P.H.S.

MeSH terms

  • Cobalt / chemistry
  • Fluorine Radioisotopes
  • Hydrocarbons, Fluorinated / chemistry*
  • Molecular Structure
  • Organometallic Compounds / chemical synthesis*
  • Organometallic Compounds / chemistry
  • Positron-Emission Tomography*
  • Stereoisomerism

Substances

  • Fluorine Radioisotopes
  • Hydrocarbons, Fluorinated
  • Organometallic Compounds
  • Cobalt