(5S,6R)-5-(tert-Butyl-dimethyl-silanyloxy)-6-trityloxymethyl-5,6-dihydro-pyran-2-one                                                                                                                                                              在
                                                                                                                                                                                 lithium hydroxide   、                                                                                                  
三苯基膦   、                                                                                                  
偶氮二甲酸二乙酯                                                                                                                                  作用下,
                                                                                                                                                                                                                            生成                                                 5-[(R)-1-(tert-Butyl-dimethyl-silanyloxy)-2-trityloxy-ethyl]-5H-furan-2-one   、                                                                                             (5S,6S)-5-(tert-Butyl-dimethyl-silanyloxy)-6-trityloxymethyl-5,6-dihydro-pyran-2-one