A family of phosphorescent emitter compounds containing a carbene ligand L
A
selected from the group consisting of:
is disclosed. These compounds enhance the performance of OLEDs when incorporated therein.
A Highly Active and General Catalyst for the Stille Coupling Reaction of Unreactive Aryl, Heteroaryl, and Vinyl Chlorides under Mild Conditions
作者:Dong-Hwan Lee、Yingjie Qian、Ji-Hoon Park、Jong-Suk Lee、Sang-Eun Shim、Myung-Jong Jin
DOI:10.1002/adsc.201300075
日期:2013.6.17
efficient and general catalyst in the Stillecouplingreaction of various aryl and heteroaryl chlorides with organostannanes. The results show that this catalytic system allows for the use of less reactive substrates such as deactivated or sterically hindered arylchlorides. A catalyst loading of 0.5 mol% was sufficient to achieve excellent performance under relatively mild reaction conditions. Furthermore
Total Syntheses of Menisporphine and Daurioxoisoporphine C Enabled by Photoredox-Catalyzed Direct C–H Arylation of Isoquinoline with Aryldiazonium Salt
作者:Jing Zhang、Jie Chen、Xiaoyun Zhang、Xiaoguang Lei
DOI:10.1021/jo5020432
日期:2014.11.7
due to their diverse chemical structures as well as remarkable bioactivities. Herein, we report the concise total syntheses of two isoquinoline alkaloids, menisporphine and daurioxoisoporphine C, through a mild and efficient photoredox-catalyzed direct C–H arylation of isoquinoline core with aryldiazonium salt. This new strategy is complementary to the conventional isoquinoline synthesis and would provide
Palladium-Catalyzed Cross-Coupling of Aryl Halides Using Organotitanium Nucleophiles
作者:Hang Wai Lee、Fuk Loi Lam、Chau Ming So、Chak Po Lau、Albert S. C. Chan、Fuk Yee Kwong
DOI:10.1002/anie.200904033
日期:2009.9.21
couple: Catalysts generated from Pd(OAc)2 and indolylphosphine ligands are highly effective in the titanium‐mediated coupling of arylhalides. Catalyst loadings as low as 0.05 mol % Pd can be used. The mild reaction conditions also allow the coupling of aryl sulfonyl chlorides with aryl titanium reagents to generate diaryl sulfones.
Highly active and recyclable silica gel-supported palladium catalyst for mild cross-coupling reactions of unactivated heteroaryl chlorides
作者:Dong-Hwan Lee、Ji-Young Jung、Myung-Jong Jin
DOI:10.1039/c0gc00251h
日期:——
be a highlyactive and long-lived catalyst for aqueous Suzuki, Stille and Sonogashira couplingreactions of heteroarylchlorides. A wide range of heteroarylchlorides could be efficiently coupled with different nucleophilic partners in the presence of only 0.5 mol% catalyst and undermildconditions. This is one of the most powerful heterogeneous catalysts for the couplings of diverse heteroaryl chlorides