Synthesis of 1-hydroxy-3-[3-h-3]-(4-chlorophenyl)-2-piperidone - Labeling of a New Antiinflammatory Hydroxamic Acid

Compound 1, synthezized as a potential topical antiinflammatory agent, has been labelled with tritium on the benzene ring in a position neighboring a chlorine atom. An iodinated precursor was prepared by an original six-step synthesis. Selective catalytic iodine-tritium replacement was achieved under mild reaction conditions.