In our quest to design high-density fuels, we report a variety of structurally interesting new annulated oxa-cage frameworks. Here, we investigated a linear synthetic sequence, which relies on reductive C–C bond cleavage and ring-closing metathesis as key steps. For this purpose, we utilized inexpensive and readily available starting materials such as hydroquinone and endo-dicyclopentadiene. Transannular cyclization during Grignard addition played a significant role in the design of intricate caged compounds. The creation of these new oxa-cage systems is a challenging task by traditional methods. The structure of the target compound has been unambiguously established by single-crystal X-ray diffraction studies. These data indicate that density of the RCM compound is larger than the cubane density.

在设计高密度燃料的过程中，我们报告了各种结构有趣的新型环氧基氧-笼框架。在这里，我们研究了线性合成序列，该序列依赖于还原性C–C键断裂和闭环复分解为关键步骤。为了这个目的，我们使用了便宜且容易获得的原料，例如氢醌和内-二环戊二烯。在格利雅（Grignard）添加过程中，环过环化在复杂笼状化合物的设计中起着重要作用。通过传统方法，创建这些新的氧笼系统是一项艰巨的任务。通过单晶X射线衍射研究已经明确地确定了目标化合物的结构。这些数据表明，RCM化合物的密度大于古巴的密度。