Metal-catalysed oxidation of acetylenes and diazo-ketones

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Abstract
The molybdenum-catalysed oxidation of acetylenes and the metal-catalysed decompositions and oxidations of α-diazo-ketones appear to proceed via transient metal–oxocarbene complexes. The formation of oxirens as intermediates in these reactions is excluded. The initial product from these oxidations is the corresponding α-diketone.