甲基锂   、                                                                                      
2-acetoxy-5,10-isopropylidenedioxy-3-(4'-methoxyphenylthio)-9-oxo-1,4,4a(R*),9,9a(S*),10(R*)-hexahydroanthracene                                                                                                                                                                                              以
                                                                                         
乙二醇二甲醚   、                                                                                         
乙醚                                                                                  为溶剂,
                                                                                                                                                    反应 1.5h,
                                                                                                                以39%的产率得到9-hydroxy-5,10-isopropylidenedioxy-3-(4'-methoxyphenylthio)-9-methyl-2-oxo-1,2,3(S*),4,4a(R*),9(S*),9a(S*),10(R*)-octahydroanthracene