 The Upjohn dihydroxylation is still often used for the formation of "cis"-vicinal diols; however, it can be slow and is prone to ketone byproduct formation.One of the peculiarities of the dihydroxylation of olefins is that the standard "racemic" method (the Upjohn dihydroxylation) is slower and often lower yielding than the asymmetric method (the Sharpless asymmetric dihydroxylation).In response to these problems, Stuart Warren and co-workers employed similar reaction conditions to the Sharpless asymmetric dihydroxylation, but replacing the chiral ligands with the achiral quinuclidine to give a racemic reaction product (assuming an achiral starting material is employed).