(S)-(-)-2-乙酰氧基丙酸   、                                                                                      
(8S,8aS)-8a-methyl-8-[(2-methylpropan-2-yl)oxy]-2,3,5,6,7,8-hexahydro-1H-naphthalene-2,3-diol                                                                                                                                                              在
                                                                                                                                                                                 
lead(IV) acetate                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
二氯甲烷                                                                                  为溶剂,
                                                                                                                                                                                        以70%的产率得到(2'S)-acetoxy-propionic acid (1S)-[(2'S)-acetoxy-propionyloxy]-(5S)-tert-butoxy-(4aS)-methyl-9-oxo-decahydro-cyclohepta[c]pyran-(3S)-yl ester