Synthesis of 4,4′-spirobi[pentacyclo[5.4.0.0 2,6 .0 3,10 .0 5,9 ]undecane]
作者:Yijun Shi、Jingyang Jiang、Jianzhi Wang、Yanhua Wang
DOI:10.1016/j.tetlet.2015.10.050
日期:2015.12
4,4′-Spirobi[pentacyclo[5.4.0.02,6.03,10.05,9]undecane] (10) is first successfully prepared by a nine step synthetic scheme starting from the key intermediate (cyclopentadiene derivate, 2). This synthetic scheme avoids using the hardly obtainable spiro[4.4]nonatetraene (18) as the starting material. In the structure of 10, two polycyclic cages share one spiro-carbon so that it has high density (1.2663 g/cm3)
首先通过九步合成方案成功地从关键中间体(环戊二烯衍生物,4,4'-螺环二[五环[5.4.0.0 2,6 .0 3,10 .0 5,9 ]十一烷)制备(10)2)。该合成方案避免了使用难以获得的螺[4.4]壬酸酯(18)作为起始原料。在10的结构中,两个多环笼共享一个螺碳,因此密度高(1.2663 g / cm 3),燃烧体积热高(53.353 MJ / L)。