Results 61 to 70 of about 65,001 (335)

On the bromination of the dihydroazulene/vinylheptafulvene photo-/thermoswitch

Beilstein Journal of Organic Chemistry, 2012
Background: The dihydroazulene (DHA)/vinylheptafulvene (VHF) system (with two cyano groups at C1) functions as a photo-/thermoswitch. Direct ionic bromination of DHA has previously furnished a regioselective route to a 7,8-dibromide, which by elimination
Virginia Mazzanti, Martina Cacciarini, Søren L. Broman, Christian R. Parker, Magnus Schau-Magnussen, Andrew D. Bond, Mogens B. Nielsen   +6 more
doaj   +1 more source

Ruthenium-Catalyzed meta-Selective C—H Bromination

Angewandte Chemie, 2015
The first example of a transition-metal-catalyzed, meta-selective C–H bromination procedure is reported. In the presence of catalytic [{Ru(p-cymene)Cl2}2], tetrabutylammonium tribromide can be used to functionalize the meta C–H bond of 2-phenylpyridine ...
Christopher J. Teskey, Andrew Y. W. Lui, M. Greaney   +2 more
semanticscholar   +1 more source

Mitigating Efficiency Roll‐Off in Phosphor‐Sensitized Fluorescence OLEDs via Molecular Polarity‐Based Benzofuropyridine Host Engineering

Advanced Optical Materials, EarlyView.
Positional isomerism in dibenzofuran‐based n‐type hosts modulates molecular polarity, charge‐transport balance, and emissive‐layer packing. The higher‐polarity BFPDB‐2 host facilitates efficient energy funneling, reduced aggregation, and preferential dipole orientation, leading to phosphor‐sensitized fluorescence OLEDs with enhanced external quantum ...
Nargis Ali, Xuyao Song, Yun‐Hi Kim, Min Chul Suh   +3 more
wiley   +1 more source

Hydrazone ligated–vanadium(V) complex: catalytic oxidative bromination of organic substrates promoted by Brønsted acid or Lewis acid

Discover Chemistry
Vanadium(V) complex was prepared by reaction of vanadium acetylacetonate with hydrazone ligand. The complex was characterized by IR, 1H NMR and UV-Visible spectroscopy.
Sunshine Dominic Kurbah, Ndege Simisi Clovis   +1 more
doaj   +1 more source

Naphthyridine‐Based Donor–Acceptor Boron Difluoride Complexes Targeting Red Emission in Organic Light‐Emitting Diodes

Advanced Optical Materials, EarlyView.
Four donor–acceptor boron difluoride complexes based on triphenylamine donor and a naphthyridine acceptor units were synthesized, studied, and applied as OLED emitters. They exhibit pronounced intramolecular charge transfer character, balanced charge transport properties, and tunable emission. Near‐unity PLQYs are achieved for selected compounds, while
Omar Lahna, Stepan Kutsiy, Dmytro Volyniuk, Roman Luboradzki, Elina Andresen, Ute Resch‐Genger, Juozas V. Grazulevicius, Pavlo Stakhira, Mykhaylo A. Potopnyk   +8 more
wiley   +1 more source

Bromination of 2,S-dimethoxybenzaldehyde [PDF]

, 1984
Bromination of 2,5-dimethoxybenzaldehyde (1) gives 4-bromo-2,5-dimethoxy-benzaldehyde (2) and not 6-bromo-2,5-dimethoxybenzaldehyde (3) as previously reported by Rubenstein (1925).
Ahmad, Faujan, Bruce, Malcolm J.
core  

Synthesis and Structure of Unsymmetrical Anthracenyl-Isoxazole Antitumor Agents Via the Diastereoselective Bromination of 3-(9′-Anthryl)-Isoxazole Esters

Crystals
In pursuit of unsymmetrical precursors for the novel series of anthracenyl-isoxazole amide (AIM) antitumor agents, a series of substituted anthracenes were subjected to bromination and re-aromatization in our study, during which we solved four single ...
Michael J. Campbell, Daniel A. Decato, Chun Li, Matthew J. Weaver, Nicholas R. Natale   +4 more
doaj   +1 more source

Nonanebis(peroxoic acid): a stable peracid for oxidative bromination of aminoanthracene-9,10-dione

Beilstein Journal of Organic Chemistry, 2014
A new protocol for the oxidative bromination of aminoanthracene-9,10-dione, which is highly deactivated towards the electrophilic substitution is investigated.
Vilas Venunath Patil, Ganapati Subray Shankarling   +1 more
doaj   +1 more source

Enantioselective Synthesis of 3-Arylquinazolin-4(3H)-ones via Peptide-Catalyzed Atroposelective Bromination

Journal of the American Chemical Society, 2015
We report the development of a tertiary amine-containing β-turn peptide that catalyzes the atroposelective bromination of pharmaceutically relevant 3-arylquinazolin-4(3H)-ones (quinazolinones) with high levels of enantioinduction over a broad substrate ...
Matthew E Diener, A. J. Metrano, S. Kusano, Scott J. Miller   +3 more
semanticscholar   +1 more source

Natural Products Inspired Scaffold Diversification Leads to Unnatural Molecular Warhead and Covalent Strategy to Modulating Protein Function through Electrophilic Bromine Transfer

Advanced Science, EarlyView.
We report a new thiolate‐reactive α,α‐gem‐dibromo lactam warhead that activates transcription factor Nrf2 and demonstrates anti‐inflammatory activities, which have implications in cancer, neurodegeneration, and cardiovascular diseases. RNA‐seq illuminated detailed transcriptional profiles, and chemical reactions with cysteine‐containing compounds ...
Beau R. Brummel, Sofia Kokkaliari, Qiwen Gao, Jinjing Chen, Larissa Costa de Almeida, Srinivasarao Tenneti, Derek A. Leas, Eli Levit, Lewis S. Alexander, Khalil A. Abboud, Pingrong Wei, Michael D. Cameron, James R. Rocca, Ranjala Ratnayake, Donna D. Zhang, Hendrik Luesch, Robert W. Huigens III   +16 more
wiley   +1 more source