THE RADIOSYNTHESIS OF NO-CARRIER ADDED [1-C-11]ALLYL ALCOHOL EVIDENCEFOR THE FORMATION OF A NEW REDUCING SPECIES - LITHIUM ALUMINUM-HYDRIDE VINYLMAGNESIUM BROMIDE

Lithium aluminium hydride in the presence of vinylmagnesium bromide (1 :1 molar ratio) affords a potent reagent for the reduction of acrylic acid to allyl alcohol (ratio of allyl alcohol to 1-propanol: 3:2). Thi s reducing mixture has allowed the preparation of no-carrier added [1( -11)C]allyl alcohol with a 25% yield (decay corrected at the end of ra dionuclide production, overall synthesis time including GC: 40 min) in a one step procedure from [C-11]carbon dioxide (C-11: t(1/2):20.4 min ). [1(-11)C]1-propanol was obtained in parallel with a 6.5% yield.