Ligand-Free Iron-Catalyzed Carbon (sp<sup>2</sup>)–Carbon (sp<sup>2</sup>) Oxidative Homo-Coupling of Alkenyllithiums
作者:Zhuliang Zhong、Zhi-Yong Wang、Shao-Fei Ni、Li Dang、Hung Kay Lee、Xiao-Shui Peng、Henry N. C. Wong
DOI:10.1021/acs.orglett.8b03893
日期:2019.2.1
and hexa-substituted 1,3-butadienes. This one-pot procedure involves lithium–iodine exchange to generate the corresponding vinyllithium intermediates. A subsequent iron-catalyzed ligand-free oxidativehomo-coupling eventually led to the formation of 1,3-butadienes in acceptable to excellent isolated yields.
The invention relates to the improvement of organic electroluminescent devices, in which compounds that are represented by formula (1) are used, in particular as hole injection materials or hole transport materials in a hole injection layer or hole transport layer.
A Direct Synthesis of Symmetrical (E,E)-1,4-Diaryl-1,3-butadienes by Wenkert Arylation of Thiophene
作者:Lukas Hintermann、Marco Schmitz、Yun Chen
DOI:10.1002/adsc.201000350
日期:2010.10.4
The nickel-catalyzed coupling of thiophene with aryl Grignard reagents (Wenkert reaction) is accelerated by N-heterocyclic carbene or trialkylphosphane ligands, providing a general, scalable directsynthesis of symmetrical 1,4-diarylbutadienes.
New Aspects of Diphenylbutadiene Photochemistry. Regiospecific Hula-Twist Photoisomerization
作者:Lan-ying Yang、Robert S. H. Liu、Kelly J. Boarman、Natalie L. Wendt、Jin Liu
DOI:10.1021/ja043193p
日期:2005.3.1
In EPA glass at liquid nitrogen temperature, the E,E isomer of diphenylbutadiene (DPB) was photostable, while both the Z,E and Z,Z isomers underwent selective HT isomerization at center 1 giving the stable conformer of the double-bond isomerized trans product. That HT-1 was involved rather than the OBF process was shown by results of o,o'-dimethyl-DPB. Formation of unstable trans product corresponded
Synthesis of Buta-1,3-dienes through Palladium-Catalyzed Homocoupling of Aromatic Alkenes
作者:Yanmei Wen、Jianying Xie、Chunmei Deng、Yulian Wu
DOI:10.1055/s-0034-1380749
日期:——
A series of buta-1,3-dienes have been directly synthesized via a convenient palladium-catalyzed homodehydrogenation coupling reaction of aromatic alkenes under mild conditions. The homocoupling reaction enables a rapid synthesis of multisubstituted butadiene which shows typical aggregation-induced emission enhancement (AIEE) characteristics because it is practically not emissive in solution but emits blue fluorescence in aggregates.