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Mechanism of Cobalt-Porphyrin–Catalyzed Aziridination

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journal contribution
posted on 03.06.2011, 00:00 by Kathrin H. Hopmann, Abhik Ghosh
Density functional theory (DFT; OLYP) calculations clearly indicate the involvement of a cobalt nitrene in cobalt-porphyrin–catalyzed alkene aziridinations, as well as in allylic aminations. The transition state for the cobalt-nitrene–alkene interaction may be described as triradicaloid. A subsequent carbon radical, if it exists at all as an intermediate, collapses in an essentially barrierless manner to the aziridine product.