"On water": efficient iron-catalyzed cycloaddition of aziridines with heterocumulenes.

In suspension: the reaction of aziridines with heterocumulenes in the presence of Fe(NO(3))(3)⋅9H(2)O in aqueous suspension provides access to functionalized five-membered heterocycles in good to high yields. This protocol has a wide substrate scope, is simple, and uses a nontoxic and cheap catalyst.

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