Results 111 to 120 of about 9,595 (219)

Regioselective reactions of 3,4-pyridynes enabled by the aryne distortion model. [PDF]

, 2013
The pyridine heterocycle continues to play a vital role in the development of human medicines. More than 100 currently marketed drugs contain this privileged unit, which remains highly sought after synthetically. We report an efficient means to access di-
Garg, Neil K, Goetz, Adam E
core  

C2-Alkenylation of N-heteroaromatic compounds:Via Brønsted acid catalysis [PDF]

, 2016
C2-alkenylated heteroaromatics can be accessed by simple Brønsted acid catalysed union of diverse heteroarene N-oxides with alkenes. The scope and limitations of the process are outlined.
Bower, John, Crisenza, Giacomo, Dauncey, Elizabeth M.   +2 more
core   +2 more sources

Tabernaemontana catharinensis: A Source of Indole Alkaloids With Potential Activity as Chemotherapeutic Agents

Chemistry &Biodiversity, Volume 23, Issue 4, April 2026.
ABSTRACT This study aimed to evaluate the antitumor activity of fractions rich in indole alkaloids extracted from the leaves of the species Tabernaemontana catharinensis. The chemical composition was analyzed using high‐resolution mass spectrometry (HRMS), which identified nine known indole alkaloids, including voacangine, voacangine hydroxyindolenine,
Ana Júlia Gomes Donada, Rafael Freitas Corá, Bianca Canci, Mariana Roesch‐Ely, Pauline Fagundes Rosales, Sidnei Moura   +5 more
wiley   +1 more source

Isoquinolines from the Roots of Thalictrum flavum L. and Their Evaluation as Antiparasitic Compounds

Molecules, 2010
Alkaloids from Thalictrum flavum L. (Ranuculaceae) growing in the Loire valley (France) were isolated and evaluated for their antiplasmodial and leishmanicidal activities.
Pascal Richomme, Jacqueline Ropivia, Fabrice Pagniez, Patrice Le Pape, Séverine Derbré, Caroline Rouger   +5 more
doaj   +1 more source

Research Progress of Polyoxometalate‐Integrated Frameworks: Syntheses, Properties, and Applications

ChemistryEurope, Volume 4, Issue 4, April 2026.
This review systematically summarizes the integration of polyoxometalates with covalent organic frameworks, metal‐organic frameworks, hydrogen‐bonded organic frameworks, and emerging porous hosts. It highlights synergistic effects, synthesis strategies, and applications in catalysis, energy storage, sensing, and biomedicine, while addressing current ...
De‐Yin Wang, Zhang‐Di Liu, Rui Xing, Zi‐Hao Wei, Zaixiang Zhang, Yang Yang, Jin Zhu   +6 more
wiley   +1 more source

Alkaloidszármazékok szintézise = Synthesis of alkaloid derivatives [PDF]

, 2009
a) Elsőként alkalmaztunk 3-nitrokromén-származékokat 2 pi komponensként azometin-ilidek 1,3-dipoláris cikloaddíciójában b) Új, egyedényes eljárást dolgoztunk ki hexahidro-pirrolo[2,1-a]izokinolinok előállítására c) Új azepin gyűrűt tartalmozó ...
Nyerges, Miklós, Pintér, Áron, Toke, László, Virányi, Andrea   +3 more
core  

Skeletal Editing from Pyridine to Aniline via C‐Insertion and N‐Isomerization

ChemistryEurope, Volume 4, Issue 4, April 2026.
A concise protocol is presented that converts pyridines into anilines by externalizing the original pyridine nitrogen at either the "ipso" or "ortho" position, which results in para or meta‐primary aniline products. A key carbene‐insertion step precedes nitrogen migration, preserving both ring size and overall structure.
Yun Luo, Jing Dai, Yongchang Wei, Chang Min   +3 more
wiley   +1 more source

Copper‐ and Silver‐Catalyzed Reactions of Active Methylene Isocyanides: Facile Access to Highly Substituted Five‐ and Six‐Membered Heterocycles

Chemistry – A European Journal, Volume 32, Issue 13, 1 April 2026.
This review summarizes recent advances in copper‐ and silver‐catalyzed reactions of active methylene isocyanides for the synthesis of highly substituted five‐ and six‐membered heterocycles. Emphasis is placed on [3+n] cycloadditions, annulations, and asymmetric strategies, highlighting current limitations and future opportunities in heterocycle ...
Jimil George, Kyungsoo Oh
wiley   +1 more source

A Convenient One‐Pot CuI‐Catalyzed Procedure for the Synthesis of S‐(N‐Heteroaryl) Thiocarboxylates From N‐Heteroaryl Bromides and Thiobenzoic Acid

ChemistryOpen, Volume 15, Issue 4, April 2026.
A one‐pot two‐step CuI‐catalyzed procedure for the synthesis of S‐(N‐heteroaryl) thiocarboxylates from N‐heteroaryl bromides and thiobenzoic acid was developed, which is highlighted by shorter reaction time, a smaller amount of iodide source and scalability.
Jiamin Pan, Suting Xie, Yong Li, Jiang Wu, Guilong Zhao   +4 more
wiley   +1 more source

Biodegradable Sodium Alginate Films Incorporated With Jateorhiza palmata (Lam.) Miers Extract for Active Food Packaging

Packaging Technology and Science, Volume 39, Issue 4, Page 367-382, April 2026.
Development of biodegradable sodium alginate films incorporated with J. palmata root extracts showing enhanced antioxidant and functional properties for active food packaging applications. ABSTRACT Biodegradable packaging helps reduce environmental impact by decomposing naturally and preventing plastic accumulation in ecosystems.
Carlos Augusto Badillo Almeira, Suiane Savazzi, Raul Remor Dalsasso, Alcilene Rodrigues Monteiro, Alessandro de Oliveira Rios   +4 more
wiley   +1 more source