作者:Teruo Shinmyozu、Mihoko Hirakida、Shirou Kusumoto、Mie Tomonou、Takahiko Inazu、Jerzy M. Rudzinski
DOI:10.1246/cl.1994.669
日期:1994.4
[35](1,2,3,4,5)Cyclophane 3 was synthesized by an acid-catalyzed eyclization between a pseudogeminally substituted acetyl group and a chloromethyl group of a tetra-bridged compound followed by two-step hydrogenation of the resulting penta-bridged bromo-olefin. 3 shows the strongest transannular π–π interaction among [m.n]- and multibridged benzenophanes synthesized so far. 3 is conformationally mobile
[35](1,2,3,4,5)Cyclophane 3 是通过酸催化环化在四桥化合物的赝晶取代的乙酰基和氯甲基之间合成的,然后对所得五元进行两步氢化-桥接溴烯烃。图3显示了迄今为止合成的[mn]-和多桥苯并苯之间最强的跨环π-π相互作用。3 在室温下在 CD2Cl2 中构象移动,在 -90 °C 下观察到两个构象异构体 3a 和 3b。