1,3-Dipolar cycloaddition of benzylidenecyclopropane with various aldonitrones proceeds regioselectively giving good yields of 4-spirocyclopropane isoxazolidines. In the case of aldonitrones, bearing carbamoyl- or aryl-groups on the carbon atom, only the cis-isomer is formed. The compounds synthesized were tested for their virus-inhibiting activity.
                                    亚苄基
环丙烷与各种醛基的1,3-偶极环加成反应可以区域选择性地产生,从而得到4-螺
环丙烷异恶唑烷的良好产率。对于在碳原子上带有
氨基甲酰基或芳基的醛基亚硝基,仅形成顺式异构体。测试合成的化合物的病毒抑制活性。