SUMMARYThese labeled analogs of

SUMMARYThe synthesis of octanal and benzaldehyde, labeled with l l C i n the carbonyl position, i s reported. prepared via an insertion reaction of 11CO into the boroncarbon bond of 6-heptyl -9-BBN, fol lowed by oxidative hydrolysis. of phenyl magnesium bromide w i t h 11C02, and subsequent reduction of the labeled benzoic acid t o benzylalcohol which was then oxidized t o the final product by Cr02C12. Both aldehydes were purified via GLPC, leading t o radiochemical purities of >99.5% i n each case. The radiochemical yield f o r octanal and benzaldehyde was 30 ? 5% and 15 f 5%, respectively. The overall synthesis time was 50 ? 10 min f o r each compound llC-octanal, l1C-benza1 dehyde, llC-organoboranes Octanal wasBenzaldehyde was synthesized by the reaction