作者:Scott D. Rychnovsky、George Griesgraber、Sam Zeller、Donald J. Skalitzky                                    
                                    
                                        DOI:10.1021/jo00017a032
                                    
                                    
                                        日期:1991.8
                                    
                                    Optically pure (> 97% ee) (2R,4R)-1,2:4,5-diepoxypentane (1) and its enantiomer can be prepared in three steps from 2,4-pentanedione without the need for chromatographic purification.  Diepoxide 1 is an efficient precursor to a wide variety of optically pure syn and anti 1,3-diols.  Reaction with excess nucleophile gives symmetric[GRAPHICS]anti 1,3-diols in good yield.  Reaction with a slight excess of alkyllithium under Ganem's conditions gives the monoepoxides 5 in good yield.  Addition of a second nucleophile to monoepoxide 5 gives asymmetric anti 1,3-diols.  Mitsunobu inversion of monoepoxide 5 followed by addition of a second nucleophile gives syn 1,3-diols.  Optically pure syn and anti 1,3-diols are available from diepoxide 1 in one to three steps and good overall yield.