An overview of the literature through May 2004 on the available chiral auxiliaries for stereoselective epoxidation is reviewed, with emphasis on synthetic utility. The mechanistic complexities of the π-facial selectivity are scrutinized and plausible transition structures for the oxygen-transfer process are proposed. Convenient methods for the removal of the chiral auxiliary and applications of the released optically active building blocks in synthesis are featured.
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Zhang et al. (2005) studied this question.