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