Vanadyl bisacetylacetonate

The readily available catalyst vanadyl bisacetylacetonate when used with r-butyl hydroperoxide in benzene will oxidize secondary alcohols (Scheme 20) much more rapidly than primary ones (rate ratio > 100 1), but the other oxidizing properties of this system, in particular the epoxidation of allylic alcohols and the cleavage of 1,2-diols might well limit its uses somewhat. ... 

Templeton, D. H., and Templeton, L. K. Polarized X-ray absorption and double refraction in vanadyl bisacetylacetonate. Acta Cryst. A36, 237-241 (1980). 

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