For the use of esters of tartaric acid as chiral auxiliaries in the Sharpless enantioselective epoxidation of allylic alcohols, see tert-Butyl- hydroperoxide. For a review the use of tartrate esters as chiral auxiliaries, e.g. in the Simmons-Smith cyclopropanantion reaction and in 1,3-dipolar cycloaddition reactions, see: Synlett, 1075 (2003).