Catalysis of fluorine addition to double bond: An improvement of method for synthesis of 18F PET agents

Catalysis for reaction of electrophilic fluorine addition to a fluorinated double bond is described. The presence of small amounts of iodine, bromine, or boron trifluoride increases an overall product yield and degree of fluorine incorporation, making the reaction a more efficient method for preparation of F-18 positron emission tomography agents. A possible mechanism of catalytic action of iodine is discussed. (C) 2009 Elsevier Ltd. All rights reserved.