To investigate if other halogen cation transfer reagents can catalyse aziridine formation, the reaction was repeated with 10 mol% of monopyridineiodine chloride (PyICl); a cheap, off-the-shelf I-cation transfer agent (Scheme 1d). Gratifyingly, this preliminary and unoptimised reaction process afforded racemic cis-aziridine 4, albeit generated in a lower 49% yield than when 1 was employed. Nevertheless, the commercial availability of PyICl and its application in a simple, straightforward protocol suggests alternative structure and function diverse halogen cation transfer activating catalysts based on PyICl have significant potential for the development of a new class of catalyst with wide ranging activation potential in as yet unexplored important reactions.