合成了13,14-二甲基苯并[ c ]茚并[2,1- a ]芴(9b),这是首次分离出的2,3-萘醌二甲烷衍生物。根据量子化学研究,9b的X射线晶体结构,光谱和电化学性质表明其基本的单峰双自由基特性高于11,12-二二甲基萘并[2,1- a ]芴(8b)。与氧和dichlorodicyano-环加成p-苯醌是在内部萘碳而不是反应性最强的环外碳上发生的,因为后者位置上的均三基具有有效的空间保护作用。[4 + 2]环二聚反应也发生在内萘位置为4π组分,在外萘环处为2π组分。
The Temperature and Solvent Effects on the AlCl<sub>3</sub>-catalyzed Cyclization of 3,3′-Diphenyl-2,2′-biindenyl-1,1′-dione
作者:Fumio Toda、Yozo Todo
DOI:10.1246/bcsj.50.273
日期:1977.1
Upon the AlCl3-catalyzed cyclization of the title biindenone (1) into benz[c]indeno[2,1-a]fluorene-13,14-dione (2) and 3,3′: 3,3′-di(o-phenylene)-2,2′-biindenylidene-1,1′-dione (3), the 2:3 ratio increased when the reaction temperature was raised and decreased when the polarity of the solvent was increased.
Serendipitous Rediscovery of the Facile Cyclization of
<i>Z</i>
,
<i>Z</i>
‐3,5‐Octadiene‐1,7‐diyne Derivatives to Afford Stable, Substituted Naphthocyclobutadienes
作者:Joshua E. Barker、Takuya Kodama、Min K. Song、Conerd K. Frederickson、Tanguy Jousselin‐Oba、Lev N. Zakharov、Jérôme Marrot、Michel Frigoli、Richard P. Johnson、Michael M. Haley
DOI:10.1002/cplu.201800605
日期:2019.6
The serendipitous isolation of very small amounts of two naphthocyclobutadiene (NCB) derivatives has led to the computational re-examination of the electrocyclization of Z,Z-3,5-octadiene-1,7-diyne as well as the experimental and computational study of diethynylindeno[2,1-a]fluorene derivatives that contain the 3,5-octadiene-1,7-diyne motif as part of a larger π-framework. In both cases the calculated
Twisted Polycyclic Aromatic Hydrocarbon with a Cyclooctatetraene Core via Formal [4+4] Dimerization of Indenofluorene
作者:Yoshito Tobe、Shunpei Nobusue
DOI:10.1055/s-0035-1562361
日期:——
A polycyclic aromatic hydrocarbon having a twisted cyclooctatetraene (COT) core was prepared by a formal [4+4] dimerization of an in situ generated indeno[2,1-a]fluorene derivative. The compound consists of two indenofluorene frameworks connected with two double bonds and adopts a twisted geometry to avoid intramolecular steric repulsion. It exhibits a long-wavelength absorption band with a maximum
Novel Materials for Organic Electroluminescent Devices
申请人:Heil Holger
公开号:US20080193797A1
公开(公告)日:2008-08-14
The present invention relates to compounds of the formula (1) and to the use thereof in organic electroluminescent devices. The compounds of the formula (1) are used as host material or dopant in the emitting layer and/or as hole-transport material and/or as electron-transport material.