Synthesis of quinoxalines and pyrido[2,3-b]pyrazines by Suzuki–Miyaura cross-coupling reaction
作者:Arjun Kumbhar、Sanjay Jadhav、Rajashri Salunkhe
DOI:10.1007/s11164-015-2377-7
日期:2016.6
Bromo-substituted quinoxalines and pyrido[2,3-b]pyrazines were synthesized by condensation reactions of aromatic 1,2-diamino and 1,2-diketone compounds. These compounds were used as common intermediates for postcondensation modification by Suzuki–Miyaura coupling reaction to form aryl-substituted quinoxalines and pyrido[2,3-b]pyrazines. High-efficiency with improved product yield of aryl-substituted quinoxalines and pyrido[2,3-b]pyrazine derivatives was achieved by conducting a coupling reaction in presence of Pd(dppf)Cl2·CH2Cl2 in tetrahydrofuran (THF) using K2CO3 as base at reflux temperature.
ORGANIC COMPOUNDS AND ORGANIC LIGHT EMITTING DISPLAY DEVICE USING THE SAME
申请人:LG DISPLAY CO., LTD.
公开号:US20210198212A1
公开(公告)日:2021-07-01
The present disclosure relates to an organic compound and an organic light emitting display device using the same wherein the organic compound is represented by Chemical Formula 1 and a display device using the organic compound. The organic compound represented by Chemical Formula 1 has excellent electron transport properties and durability and is used for an electron transport layer of an organic light emitting element, thereby lowering a driving voltage and improving the luminous efficiency and lifetime.
(In the above Chemical Formula 1, at least two of X
1
, X
2
and X
3
are N, Y
1
and Y
2
are each independently a substituted or unsubstituted phenylene group or a single bond, at least one of Ar
1
and Ar
2
is selected from a substituted or unsubstituted triazine group, a functional group represented by Chemical Formula 2 and a functional group represented by Chemical Formula 3.)
Supramolecular Ensemble of a TICT-AIEE Active Pyrazine Derivative and CuO NPs: A Potential Photocatalytic System for Sonogashira Couplings
作者:Harnimarta Deol、Subhamay Pramanik、Manoj Kumar、Imran A. Khan、Vandana Bhalla
DOI:10.1021/acscatal.6b00393
日期:2016.6.3
The donor–acceptor system 4 having pyrazine scaffold as an acceptor moiety coupled to donor amino groups through rotatable phenyl rings has been synthesized, which formed aggregates in aqueousmedia, exhibited copper induced restriction to intramolecular rotation, and served as a “not quenched” probe for the detection of copper(II) ions. During this process, the aggregates of derivative 4 acted as
Y-shaped novel AIEE active push-pull quinoxaline derivatives displaying acidochromism and use towards white light emission by controlled protonation
作者:Shalu Gupta、Marilyn Daisy Milton
DOI:10.1016/j.dyepig.2021.109690
日期:2021.11
polarity from toluene to DMSO. Further, the aggregation studies confirmed the presence of aggregation induced emission enhancement (AIEE) characteristics. Quadrupolar derivatives 2a and 2f displayed nearly five-fold emission enhancement while tripodal derivatives 2b-2e displayed much lesser emission enhancement on aggregation in THF-water mixture. The photophysical studies were also explored in the
Quinoxaline Derivative, and Light-Emitting Element, Light-Emitting Device, and Electronic Device Using Quinoxaline Derivative
申请人:Kadoma Hiroshi
公开号:US20130049577A1
公开(公告)日:2013-02-28
An object is to provide a novel quinoxaline derivative. Another object is to provide a light-emitting element with low driving voltage. Still another object is to provide a light-emitting element with low power consumption. Yet another object is to provide a light-emitting device and an electronic device each having low power consumption by using such a light-emitting element. A quinoxaline derivative is provided which has a structure in which at least one of carbon at a 2-position and carbon at a 3-position of quinoxaline, and carbon of a pyridine ring are bound via an arylene group.