57356-49-7Relevant articles and documents
Pyrimidine-directed metal-free C-H borylation of 2-pyrimidylanilines: a useful process for tetra-coordinated triarylborane synthesis
Chatani, Naoto,Das, Amrita,Rej, Supriya
, p. 11447 - 11454 (2021)
Convenient, easily handled, laboratory friendly, robust approaches to afford synthetically important organoboron compounds are currently of great interest to researchers. Among the various available strategies, a metal-free approach would be overwhelmingl
Predictable site-selective functionalization: Promoter group assistedpara-halogenation ofN-substituted(hetero)aromatics under metal-free condition
Gupta, Shiv Shankar,Manisha,Kumar, Rakesh,Dhiman, Ankit Kumar,Sharma, Upendra
, p. 9675 - 9687 (2021/12/01)
Herein, regioselectivepara-C-H halogenation ofN-pyrimidyl (hetero)aromatics through SEAr (electrophilic aromatic substitution) type reaction is disclosed. SEAr type reaction has been utilized for the C5-bromination of indolines (para-selective) withN-bromosuccinimide under metal and additive-free conditions in good to excellent yields. The developed methodology is also applicable for iodination and challenging chlorination. The pyrimidyl group is identified as a reactivity tuner that also controls the regioselectivity. The present method is also applicable for selective halogenation of aniline, pyridine, indole, oxindole, pyrazole, tetrahydroquinoline, isoquinoline, and carbazole. DFT studies such as Fukui nucleophilicity and natural charge maps also support the observedp-selectivity. Post-functionalization of the title compound into the corresponding arylated, olefinated, and dihalogenated products is achieved in a one-pot, two-step fashion. Late-stage C-H bromination was also executed on drug/natural molecules (harmine, etoricoxib, clonidine, and chlorzoxazone) to demonstrate the applicability of the developed protocol.
PYRENE DERIVATIVES AND ORGANIC ELECTRO LUMINESCENT DEVICE COMPRISING SAME
-
Paragraph 0239-0243; 0487; 0504-0507, (2020/04/10)
The present invention relates to a pyrene based derivative compound of an asymmetric structure and an organic electroluminescent device comprising the same. The pyrene derivative according to the present invention is characterized by being represented by chemical formula A through chemical formula B. The pyrene derivative compound according to the present invention exhibits remarkably improved blue color purity as compared to an organic electroluminescent device using an existing pyrene based aryl amine derivative compound while being able to realize full color since life characteristic and luminance characteristic are excellent, thereby being able to be used in various display devices.