An organic light-emitting device including a first electrode, a second electrode facing the first electrode, and an organic layer disposed between the first electrode and the second electrode, wherein the organic layer includes an emission layer, and wherein the emission layer includes a fluorescent compound represented by a specific formula described in the specification.
and pyrimidines using combinations of 2-aminobenzyl alcohols and alcohols as well as benzamidine and two different alcohols, respectively. These reactions proceed with high atom efficiency via a sequence of dehydrogenation and condensation steps that give rise to selective C-C and C-N bond formations, thereby releasing 2 equiv of hydrogen and water. A hydride Mn(I) PNPpincercomplex recently developed
An efficient synthesis of quinolines, pyrimidines, quinoxalines, pyrroles, and aminomethylated aromatic compounds catalyzed by a well-defined Re(I) PNP pincer complex is described. All reactions proceed with liberation of dihydrogen and elimination of water. Under optimized reaction conditions a wide range of organic functional groups are tolerated. This study demonstrates that rhenium catalysts are
Acceptorless Dehydrogenative Synthesis of Pyrimidines from Alcohols and Amidines Catalyzed by Supported Platinum Nanoparticles
作者:Sharmin Sultana Poly、S. M. A. Hakim Siddiki、Abeda S. Touchy、Kah Wei Ting、Takashi Toyao、Zen Maeno、Yasuharu Kanda、Ken-ichi Shimizu
DOI:10.1021/acscatal.8b02814
日期:2018.12.7
Pt-catalyzed acceptorless dehydrogenation of the alcohol substrate, which is followed by sequential condensation, cyclization, and dehydrogenation. Measurements of the turnover frequency combined with the results of density functional theory calculations on different metal surfaces suggest that the adsorption energy of H on the Pt surface is optimal for the acceptorless dehydrogenation process, which causes
Reactions of N-Unsubstituted 4-Amino-1-azadienes Towards Electrophiles
作者:José Barluenga、Carlos del Pozo、Bernardo Olano
DOI:10.1055/s-1996-4160
日期:1996.1
Several reactions related to the ambident nucleophilicity of N-unsubstituted azadienes 1 are described. Thus, reaction of 1 with alkylating agents and iodobispyridinium tetrafluoroborate (IPy2BF4) leads to the C-substituted azadienes 3 and 5 respectively. Azadienes 1 and 3 are converted to the carbonyl derivatives 2 and 4 by mild hydrolysis. On the other hand, azadienes 1, 3 and 5 react through the nitrogen atoms with several carbonyl centered electrophiles to give nitrogen heterocycles such as pyrimidines 6 and 9 and dihydropyrimidines 11. All those processes are totally regioselective, azadienes 1 and 3 showing a lower nucleophilicity at nitrogen than N-substituted azadienes.