Synthesis, Structure, and Electronic Properties of <i>syn</i>-[2.2]Phenanthrenophanes: First Observation of Their Excimer Fluorescence at High Temperature
作者:Yosuke Nakamura、Takeshi Tsuihiji、Tadahiro Mita、Toshiyuki Minowa、Seiji Tobita、Haruo Shizuka、Jun Nishimura
DOI:10.1021/ja951762a
日期:1996.1.1
permeation chromatography. All of the isomers, whose structures were characterized mainly on the basis of 1H NMR spectroscopy, were in a syn conformation. X-ray crystallographic analysis of exo,endo-1a was successful, also in agreement with the results of 1H NMR. Birch reduction of 1b, followed by DDQ oxidation, afforded [4.4](3,6)phenanthrenophane 5b in an anti conformation, due to opening of the cyclobutane
通过相应二乙烯基菲的分子间[2 + 2]光环加成,首次合成了两种syn-[2.2](1,6)-和-(3,6)菲烯,1a,b。菲萘诺烷 1a、b 分别以两种(exo,exo 和 exo,endo)和三种(exo,exo, exo,endo 和endo,endo)结构异构体的混合物形式获得,通过反相 HPLC 和凝胶分离渗透色谱法。所有异构体,其结构主要基于 1H NMR 光谱表征,均处于顺式构象。exo,endo-1a 的 X 射线晶体学分析是成功的,也与 1H NMR 的结果一致。由于环丁烷环的打开,1b 的桦木还原,然后是 DDQ 氧化,提供了反构象的 [4.4](3,6)菲烷 5b。1b 的吸收光谱与菲本身的吸收光谱相对相似,而 1a 的吸收光谱比菲和 1b 的吸收光谱更宽和红移。在这两种情况下,...