The synthesis of some 7,7-difluoro-7,8-digydropterins and pterins with
fluoroalkyl subsitutents at the 6 or 7 positions from fluorine-contai
ning aliphatic precursors and suitably substituted pyrimidines is desc
ribed. The fluorine-containing pterins were found to be very insoluble
and also stable to nucleophiles and bases in dilute aqueous solution.
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