Heteropoly acid as a novel nitrene transfer agent: a facile and practical aziridination of olefins with Chloramine-T.

Environmentally benign HPA is found to be an efficient catalyst for aziridination of olefins in the presence of inexpensive Chloramine-T as a nitrogen source: instantaneous at room temperature, requires only stoichiometric amount of olefin and no allyl amine side product.