重氮甲烷   、                                                                                      
(S)-2-Benzyloxy-4-[(5S,6R)-5-isopropenyl-6-methoxymethoxymethyl-2-methyl-cyclohex-2-en-(E)-ylidene]-2-methyl-butyric acid                                                                                                                                                                                              以
                                                                                         
乙醚                                                                                  为溶剂,
                                                                                                                                                                                        以95%的产率得到(S)-2-Benzyloxy-4-[(5S,6R)-5-isopropenyl-6-methoxymethoxymethyl-2-methyl-cyclohex-2-en-(E)-ylidene]-2-methyl-butyric acid methyl ester