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