dimethyl (E)-2-((R)-4,4-diethoxy-1-nitrobutan-2-yl)-4-ethyl-3-oxonon-4-enedioate 在
silica gel supported potassium hydroxide 作用下,
以
四氢呋喃 为溶剂,
以80%的产率得到methyl (1R,2R,3S,4R,5R)-2-(2,2-diethoxyethyl)-5-ethyl-4-(4-methoxy-4-oxobutyl)-3-nitro-6-oxocyclohexanecarboxylate