cyclopentadiene with ethyl (E)- and (Z)-3-nitrocrotonate were carried out to give only the (2+4)-nitro adduct as a mixture of three diastereomers, while that of the diene with ethyl (Z)-3-nitrocinnamate gave two kinds of cycloaddition products, (2+2)- and (2+4)-nitro adducts. All the nitro adducts were reduced with aluminum-amalgam to give the corresponding mono- and dihydroxyamino compounds, in which
环戊二烯与 (E)- 和 (Z)-3- 硝基
巴豆酸乙酯的 Diels-Alder 反应仅得到 (2+4)-硝基加合物,作为三种非对映异构体的混合物,而二烯与乙基(Z)-
3-硝基肉桂酸酯得到两种环加成产物,(2+2)-和(2+4)-硝基加合物。所有硝基加合物用铝
汞齐还原得到相应的单和二羟基
氨基化合物,其中邻位内-乙氧基羰基-内-羟基
氨基衍
生物容易环化,得到含有
异恶唑烷酮环的
三环化合物。所有新化合物的立体
化学都是在 IR 和 NMR 光谱分析的基础上建立的。