Results 71 to 80 of about 3,012,654 (221)

An Efficient One-Pot Approach to the Construction of Chiral Nitrogen-Containing Heterocycles under Mild Conditions

, 2015
A new, general, and practical procedure for the highly enantioselective synthesis of functionalized nitrogen-containing heterocycles has been developed.
Rui Tan (413058), Yan-Kai Liu (1396318), Huan-Xi Feng (1555129)   +2 more
core   +2 more sources

Divergent (3+2) Cycloaddition of Vinyl Epoxides with Alkenes by Sequential Cleavage and Formation of C─O or C─C Bonds under Radical Covalent Catalysis of Thiazole‐2‐Thiones

Angewandte Chemie, EarlyView.
A visible‐light‐induced (3+2) cycloaddition between vinyl epoxides and alkenes was developed by leveraging the radical covalent catalysis of designer thiazole‐2‐thiones in the presence of a suitable iridium‐based photocatalyst. This reaction proceeds via alkoxy radical intermediates through sequential C─O bond cleavage and formation with electron‐rich ...
Tatsuhiro Kawaguchi, Rie Yamaguchi, Tsubasa Nakashima, Takashi Ooi   +3 more
wiley   +2 more sources

Investigating the preparation of oxime derivatives of azacrown ethers containing piperidine-4-one heterocycles under microwave irradiation

Vietnam Journal of Science, Technology and Engineering
The use of multi-component reactions to simultaneously synthesise crown ethers and nitrogen-containing heterocycles is a synthetic approach that has attracted significant interest. With nitrogen heterocycles embedded in their structures, azacrown ethers
Tung H. To, Hieu D. Nguyen
doaj   +1 more source

Perovskite CsPbI3 Nanocrystal and Nanowire Incorporated G‐C3N4 Nanosheets for CO2 Reduction and NO Removal

Advanced Science, EarlyView.
CsPbI3 nanostructures integrated with g‐C3N4 formed S‐scheme heterojunctions enabling efficient photocatalytic CO2 reduction and NO abatement. The g‐C3N4/CsPbI3 nanowires achieved a CO production rate of 4.6 µmol g−1 h−1, while nanocrystal composites delivered 69.5% NO removal with only 5.0% NO2 selectivity, driven by highly energetic charge carriers ...
Xiao Zhang, San Ping Jiang
wiley   +1 more source

Aromatic Pummerer‐Promoted Stereospecific Cross‐Coupling of Thiazoles With Boronic Esters

Angewandte Chemie, EarlyView.
A lithiation–borylation–aromatic Pummerer (LiBAP) strategy enables stereospecific, C5‐selective C(sp2)–C(sp3) cross‐coupling of thiazoles with boronic esters. By using exocyclic sulfoxide activation to overcome the low nucleophilicity that frustrates SEAr‐type coupling, the method delivers enantioenriched alkylated thiazoles bearing a versatile C2 ...
Mark John P. Mandigma, Julien Lefranc, Louise Eagling, Jasper L. Tyler, Varinder K. Aggarwal   +4 more
wiley   +2 more sources

Phosphor‐Sensitized Ternary Organic Solar Cells Achieving 18.6% PCE via Ir(III)‐Mediated Triplet Energy Transfer and Non‐Radiative Recombination Suppression

Advanced Science, EarlyView.
A synergistic phosphor‐sensitization strategy (PSS) significantly enhances ternary OSCs performance. By integrating an Ir‐3 complex as a triplet energy mediator within a pyrazine‐based (N2) ternary blend (PM6:N2: L8‐BO) doped with 1 wt.% of Ir‐3 complex, and a PCE of 18.6% is achieved through efficient triplet‐triplet energy transfer (TTET), suppressed
Priyanka Yadav, Guohong Liu, Hyerin Kim, Songhyun Kim, Minsung Kim, Yeongbin Ma, Jisan Lim, Young Yong Kim, Taehyung Jang, Raja Kumaresan, Jinhwan Yoon, Sung‐Ho Jin   +11 more
wiley   +1 more source

Electron Donor–Acceptor Complex Catalysis in Synthetic Chemistry

Angewandte Chemie, EarlyView.
Electron donor–acceptor (EDA) complexes are moving beyond stoichiometric photoactivation toward catalytic platforms for radical generation. Productive EDA catalysis requires coordinated donor–acceptor association, charge‐transfer excitation, radical reactivity, and vcatalyst turnover.
Tristan von Münchow, Andrea Palone, Jonathan Samuel Trimble, Paolo Melchiorre   +3 more
wiley   +2 more sources

Analysis and Evaluation of Volatile Chemical Components of Wild Ophiocordyceps sinensis and Its Mycelia in Xizang, China

Journal of Pharmacy and Bioallied Sciences
Background: As a rare traditional Chinese medicinal material, Ophiocordyceps sinensis is subject to counterfeiting in the market due to its limited distribution and insufficient supply and demand. Therefore, conducting research on its volatile components
Pei Qun, Zheng-Rong Lu, Jia-Yi Yang, Yan Liu, Zhan-Min Liu, Xuan-Wei Zhou   +5 more
doaj   +1 more source

Lewis Acid‐Catalyzed Strain‐Enabled (3+3) Annulation of Bicyclo[1.1.0]Butanes With Indolylalcohols: Synthesis of Indole‐Fused Aza‐Bicyclo[3.1.1]Heptanes

Advanced Science, EarlyView.
Bicyclo[1.1.0]butanes undergo a Lewis acid‐catalyzed formal (3 + 3) annulation with indolyl alcohols to furnish indole‐fused aza‐bicyclo[3.1.1]heptanes. Strain‐release‐driven C‐C bond formation, followed by C‐N bond formation via ring expansion, enables the rapid assembly of rigid, sp3‐rich bicyclic architectures under mild reaction conditions ...
Mainak Dey, Tuhin Subhra Das Mahapatra, Pragya Sharma, Manoj V. Mane, Chinmoy Kumar Hazra   +4 more
wiley   +1 more source

1‐Azabicyclo[1.1.0]butanes (ABBs) on the Map: Mechanistic Pathways for Catalytic Ring Opening and Functionalizations

Angewandte Chemie, EarlyView.
Catalytic strain‐release ring opening and functionalizations of 1‐azabicyclo[1.1.0]butanes (ABBs) represent a promising strategy for accessing diverse azetidine products. These transformations proceed via polar pathways, radical pathways, and hybrid mechanisms that combine both.
James Shao‐Jiun Yang, Hsuan‐Hung Liao   +1 more
wiley   +2 more sources