Asymmetric Design of Bipolar Host Materials with Novel 1,2,4-Oxadiazole Unit in Blue Phosphorescent Device
摘要:
The intrinsic asymmetry of 1,2,4-oxadiazole was utilized to synthesize three isomers, DCzmOXD-1, DCzmOXD-2, and mCzmOXD, and high triplet energies over 2.80 eV made them good candidates for host materials in blue OLEDs. The best efficiencies of 23.0 cd A(-1)/20.5 lm W1-/11.2% in CE/PE/EQE were achieved by DCzmOXD-1 with derivation at the beta-carbon position of 1,2,4-oxadiazole.
[EN] METABOTROPIC GLUTAMATE RECEPTOR NEGATIVE ALLOSTERIC MODULATORS (NAMS) AND USES THEREOF [FR] MODULATEURS ALLOSTÉRIQUES NÉGATIFS (NAM) DU RÉCEPTEUR MÉTABOTROPIQUE DU GLUTAMATE ET UTILISATIONS DE CEUX-CI
Various 3,5-disubstituted-1,2,4-oxadiazoles are smoothly formed via copper-catalyzed cascade annulation of amidines and methylarenes. This tandem oxidation-amination-cyclization transformation represents a straightforward protocol to prepare 1,2,4-oxadiazoles from easily available starting materials, with...
Direct synthesis of 3,5‐diaryl‐1,2,
<scp>4‐oxadiazoles</scp>
using 1‐(2‐oxo‐2‐arylethyl)pyridin‐1‐iums with benzamidines
作者:Yue Zhang、Chengjun Wu、Xinyi Wan、Cunde Wang
DOI:10.1002/jhet.4354
日期:2021.12
An efficient domino protocol for the synthesis of 1,2,4-oxadiazole derivatives from readily available 1-(2-oxo-2-arylethyl)pyridin-1-iums and amidine hydrochlorides was developed. In this practical approach, N-acyl amidine precursors were formed firstly via a simple nucleophilic substitution, without the purification of N-acylamidine intermediates, and the following intramolecularly dehydrative cyclization
开发了一种用于从容易获得的 1-(2-oxo-2-arylethyl)pyridin-1-iums 和脒盐酸盐合成 1,2,4-恶二唑衍生物的有效多米诺协议。在该实用的方法,Ñ酰基脒前体通过简单的亲核取代首先形成,未经纯化Ñ -acylamidine中间体和分子内下列脱水闭环中的我的存在下,得到1,2,4-恶二唑衍生物2 / K 2 CO 3 /DMSO 表现出优异的官能团耐受性并在简单的实验条件下进行。
Thiol-promoted intermolecular cyclization to synthesize 1,2,4-oxadiazoles including tioxazafen under transition metal-free conditions
and efficient one-pot intermolecular annulation reaction for the synthesis of 1,2,4-oxadiazoles from amidoximes and benzyl thiols has been developed, in which benzyl thiols act as not only reactants but also organo-catalysts. The control experiments proved that thiol substrates could facilitate the dehydroaromatization step. High yield, functional group diversity and transitionmetal-free, extra oxidant-free
Metabotropic glutamate receptor negative allosteric modulators (NAMs) and uses thereof
申请人:Sanford Burnham Prebys Medical Discovery Institute
公开号:US10597367B2
公开(公告)日:2020-03-24
Provided herein are small molecule active metabotropic glutamate subtype-2 and -3 receptor negative allosteric modulators (NAMs), compositions comprising the compounds, and methods of using the compounds and compositions.