Results 81 to 90 of about 17,602 (278)

Routes to Cyclobutadiene and Cycloallyl Pt(II) Complexes: Dicationic Bis(Alkyne) Species as Intermediates

Chemistry – A European Journal, EarlyView.
This work demonstrates the synthesis of cationic Pt(II) η3‐cycloallyl complexes, and experimental and computational studies show a ligand bite‐angle dependence of their formation rates. The reactivity of these complexes with Brønsted acids was investigated, leading to the formation of cationic and dicationic Pt(II) η4‐cyclobutadiene complexes ...
Ouchan He, Froze Jameel, Y. Einar H. Stampehl, Liza M. Richter, Matteo Tosi, Martin Kaupp, Thomas Braun   +6 more
wiley   +1 more source

Enantioselective synthesis of planar chiral ferrocenes via palladium-catalyzed annulation with diarylethynes

Beilstein Journal of Organic Chemistry, 2013
When Boc-L-Val-OH was used as a ligand for the enantioselective Pd(II)-catalyzed annulation of N,N-substituted aminomethyl ferrocene derivatives with diarylethynes, ferrocenes with planar chirality could be achieved with excellent enantioselectivity (up ...
Yan-Chao Shi, Rong-Fei Yang, De-Wei Gao, Shu-Li You   +3 more
doaj   +1 more source

Next‐Generation Carbon‐Based Anodes for Alkali Metal‐Ion Batteries: Recent Progress on Biphenylene and Emerging Materials

ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
Recent advances in carbon‐based anodes for alkali metal‐ion batteries are critically reviewed, with emphasis on biphenylene and other emerging carbon allotropes. Biphenylene exhibits exceptional theoretical electrochemical properties beyond conventional graphite, highlighting its strong potential as a next‐generation anode material once scalable ...
Adewale Hammed Pasanaje, Nirpendra Singh
wiley   +1 more source

Mesityl‐Substituted Azuleno[1′,2′:4,5]pyrrolo[2,3‐b]quinoxalines: Synthesis, Functionalization, Photophysical, and Electrochemical Properties

European Journal of Organic Chemistry, EarlyView.
Azuleno[1′,2′:4,5]pyrrolo[2,3‐b]quinoxaline with a mesityl group as a solubilizing group was synthesized. By synthesizing derivatives in which various functional groups were introduced into two electronically distinct sites, the pyrrole nitrogen atom and the azulene five‐membered ring, we were able to reveal that the photophysical and electrochemical ...
Ryuta Sekiguchi, Hiroki Mizuno, Ikumi Uchiyama, Souta Yuruka, Atsuya Shimizu, Taku Shoji, Shunji Ito   +6 more
wiley   +1 more source

Annulation of 1H-pyrrole-2,3-diones by thioacetamide: an approach to 5-azaisatins

Beilstein Journal of Organic Chemistry, 2019
A novel approach to 1H-pyrrolo[3,2-c]pyridine-2,3-diones (5-azaisatins) has been developed via an unprecedented annulation of pyrrolo[2,1-c][1,4]benzoxazine-1,2,4-triones by thioacetamide.
Aleksandr I. Kobelev, Ekaterina E. Stepanova, Maksim V. Dmitriev, Andrey N. Maslivets   +3 more
doaj   +1 more source

Carbanion-Induced [3 + 2] Annulation of Donor–Acceptor Cyclopropanes

, 2016
The [3 + 2] annulation of donor–acceptor cyclopropanes and ylidenemalonates, in which an α-p-tosyl carbanion functions as a donor substituent, is described.
Takuya Nishio (2882783), Michiko Sasaki (1490443), Yasuhiro Kondo (1643434), Kei Takeda (1490452)   +3 more
core   +1 more source

Spirobifluorene fusion in multiple resonance frameworks enables efficient pure‐red OLEDs with narrowband emission and suppressed efficiency roll‐off

FlexMat, EarlyView.
An orthogonal spirobifluorene‐fusion strategy is introduced for B/N/O‐alternated MR frameworks, enabling improved kRISC (5.46 × 103 s−1), high ΦPL (97%), and narrow‐band pure‐red emission. Vacuum‐evaporated OLEDs incorporating this emitter achieve an EQEmax >40% (FWHM = 36 nm) and exhibit exceptionally low efficiency roll‐off at high luminance ...
Yan‐Yun Jing, Han Wu, Xiaoling Xu, Sijie Xian, Jingsheng Miao, Xiaojun Yin, Chuluo Yang, Xiaosong Cao   +7 more
wiley   +1 more source

Annulative endoperoxidation of tetronates

Organic & Biomolecular Chemistry
A novel, annulative endoperoxidation of tetronate derivatives bearing unsaturated side chains is presented.
Najmeh Rahimi, Saba Sehrish, Samuel K. Akompong, Bayler G. Barnes, Cory J. Windorff, Marat R. Talipov, Rodolfo Tello-Aburto   +6 more
openaire   +2 more sources

Tropane and Related Alkaloid Skeletons via a Radical [3+3]-Annulation Process

, 2021
A mild and simple protocol for the synthesis of 8-azabicyclo[3.2.1]octane and 9-azabicyclo[3.3.1]nonane derivatives is described. It provides these valuable bicyclic alkaloid skeletons in good yields and high levels of diastereoselectivity from simple ...
Ali, Dabbous, Vincent, Maurel, Eloïse, Colson, Jean-Marie, Mouesca, Philippe, Renaud, Julie, Andrez, Frabrice, Dénès   +6 more
core   +1 more source

Aloe vera in Food Preservation: Harnessing Bioactive Constituents for Clean‐Label Innovation and Safety Assurance

Food Safety and Health, EarlyView.
Aloe vera‐derived biopolymers and nanoformulations enhance antimicrobial, antioxidant, and barrier functions in clean‐label edible coatings and films, whereas safety‐critical anthraquinone thresholds and regulatory constraints shape their translational potential.
Acharya Balkrishna, Hemant Sharma, Sonam Verma, Amar Jeet, Sumit Kumar Singh, Sharad Kumar Tripathi, Vedpriya Arya   +6 more
wiley   +1 more source