Phase transfer mediated synthesis of radiolabelled alkyl aryl ethers and sulphides

Tritium‐ or 14C‐labelled methyl iodide and ethyl iodide were used for alkylations of phenols and thiols. The reactions were performed in a two‐phase system with phase transfer catalysis at room temperature. Products of high specific activity were isolated in isotope yields ranging from 38% to 100%.