Metal‐Mediated Oxyfunctionalization of Organic Substrates by Organometallic Intermediates—More Recent Developments and Perspectives

Organometallic intermediates in polar oxygen‐transfer reactions —an unrealistic proposition has become a certainty. This is one result of the research into the organometallic oxo and peroxo complexes, which has shown that the MC bonds of Mo VI , W VI , and Re VII Recomplexes can be stable under catalytic conditions. The precise mechanisms of the oxygen transfers are, however, still not known, and thus the very recent work by Herrmann et al. on Re catalysts such as 1 and by Sharpless et al. on OsO 4 complexes should lead to more research in this area.