4-Tetrachloro-8-oxabicyclo[3.2.1]octa-2,6-diene, derived in a single step from the cyclocondensation of furan and tetrachlorocylopropene, serves as a key intermediate for the construction of bicyclo[5.4.0]undecane synthons. Conversion to a meso-1,3 diketone is followed by a high yielding Robinson annulation reaction. Studies on the reduction of the enone product reveals a powerful preference for formation
                                    由
呋喃和
四氯环丙烯经环缩反应一步合成的2,2,3,4-四
氯-8-氧杂双环[3.2.1]八-2,6-二烯是构建双环[的重要中间体]。 5.4.0]
十一烷合成子。转化为内消旋-1,3-二酮,然后进行高产率的鲁滨逊环化反应。关于烯酮产物还原的研究揭示了强烈的偏好形成顺式环融合物。