Porphines-platinum metal complex compounds for organic electroluminescent device and organic electroluminescent device using them
申请人:Kim Sang-Dae
公开号:US20050137394A1
公开(公告)日:2005-06-23
The present invention relates to emitting compounds for organic electroluminescent device, particularly to porphines-platinum metal complex compounds represented by the following formula (1):
wherein R
1
and R
2
are as defined in the specification.
In addition, the present invention relates to an organic electroluminescent device comprising the above material which has high luminescence efficiency, enhanced operating life time, and high purity of red chromaticity.
Catalytic enantioselective epoxidation of nitroalkenes
作者:A. Vidal-Albalat、K. Świderek、J. Izquierdo、S. Rodríguez、V. Moliner、F. V. González
DOI:10.1039/c6cc03539f
日期:——
Nitroepoxides are potentially exploitable as synthons with vicinal electrophilic centers. Nevertheless, although advances have been made in the field, enantioselective epoxidation of nitroalkenes is still a challenging process. Herein we...
Tandem Inter [4 + 2]/Intra [3 + 2] Cycloadditions of Nitroalkenes. Asymmetric Synthesis of Highly Functionalized Aminocyclopentanes Using the Bridged Mode (β-Tether) Process
作者:Scott E. Denmark、Julie A. Dixon
DOI:10.1021/jo9802170
日期:1998.9.1
An asymmetric, tandem inter [4 + 2]/intra [3 + 2] bridged mode (beta-tether) cycloaddition of nitroalkenes has been developed. This new sequence involves the Lewis acid-promoted [4 + 2] cycloaddition of nitro olefins with enantiopure 1-alkoxy-1,4-dienes. The resulting nitronates, bearing a C(5) tethered dipolarophile, undergo thermal, intramolecular [3 + 2] cycloaddition to afford stable tricyclic
作者:Stefania Fioravanti、Lucio Pellacani、Sara Stabile、Paolo A. Tardella、Roberto Ballini
DOI:10.1016/s0040-4020(98)00309-3
日期:1998.5
1-(ethoxycarbonyl)-2-nitroaziridines (62–84%). A possible involvement of an aza-Michael route is proposed on the basis of regio- and stereochemical reaction outcome, compared also with the results of thermolysis of ethyl azidoformate on the same α-nitroalkenes.
Asymmetric reduction of nitroalkenes with baker's yeast
作者:Yasushi Kawai、Yoshikazu Inaba、Norihiro Tokitoh
DOI:10.1016/s0957-4166(01)00029-5
日期:2001.2
Various alpha,beta -disubstituted and trisubstituted nitroalkenes were chemoselectively reduced with baker's yeast to the corresponding nitroalkanes. Stereoselectivities of the reduction of alpha,beta -disubstituted nitroalkenes were modest to low, and e.e.s up to 52% were obtained. Trisubstituted nitroalkenes could be reduced to the corresponding nitroalkanes with excellent enantioselectivities, moderate diastereoselectivities and in good yield. (C) 2001 Elsevier Science Ltd. All rights reserved.