Results 91 to 100 of about 26,559,672 (198)

Synthetic Strategies for the Construction of Cyclobutane‐Fused Heterocycles

European Journal of Organic Chemistry, EarlyView.
Cyclobutane‐fused heterocycles are important motifs commonly present in bioactive compounds, recognized for their rigid 3D structures that confer unique properties. However, synthesizing these compounds remains challenging. This review discusses current methods for their synthesis, such as photochemical, metal‐catalyzed, and Lewis acid‐mediated [2 + 2]
Michela Vargiu, Mauro Uras, Angelo Frongia   +2 more
wiley   +1 more source

Chelation‐Assisted Metal‐Catalyzed Ligation and Cleavage Reactions for Chemical Biology

European Journal of Organic Chemistry, EarlyView.
Chelation‐assisted transition metal catalysis has emerged as a promising complement to bioorthogonal click chemistry for studying biological processes. By pre‐organizing catalytic metal centers, designed coordinating substrates enhance reactivity and biocompatibility, enabling site‐selective ligation and decaging reactions in complex biological media ...
Emilie Plantiveau, Maxime Riberaud, Frédéric Taran, Antoine Sallustrau   +3 more
wiley   +1 more source

Synthesis of S‐Arylthioxanthonium Trifluoromethanesulfonates From Thioxanthones and Diaryliodonium Salts by Copper(II) Catalysis and Application to Aryl–Heteroaryl Bond Formation by Direct LED Irradiation

European Journal of Organic Chemistry, EarlyView.
A straightforward Cu(II)‐catalyzed synthesis of S‐arylthioxanthonium trifluoromethanesulfonates from readily available thioxanthones and diaryliodonium salts is described. A broad range of salts is obtained in moderate to good yields. It is further demonstrated that S‐arylthioxanthonium trifluoromethanesulfonates act as aryl radical precursors under ...
Pierre Boulay, Fabrice Morlet‐Savary, Jean‐Michel Becht   +2 more
wiley   +1 more source

Direct Conversion of Aryl Iodides Into Benzylamines by Aminomethylation: Reaction Scope, Mechanistic Studies, and Applications

European Journal of Organic Chemistry, EarlyView.
This study presents an efficient aminomethylation of aryl iodides with formamides for the synthesis of benzylamines using a reusable palladium catalyst at a loading of 65 mol ppm. The substrate scope is systematically evaluated, and mechanistic investigations provide insight into the reaction pathway and the origin of the observed catalytic efficiency.
Abhijit Sen, Atsuya Muranaka, Yu Hatakenaka, Aya Ohno, Yoichi M. A. Yamada   +4 more
wiley   +1 more source

An easy direct arylation of 5-pyrazolones

Beilstein Journal of Organic Chemistry, 2013
A mild, efficient and catalytic ligand-free method for the direct arylation of 5-pyrazolones by Pd-catalyzed C–H bond activation is reported. The process smoothly proceeds and yields are moderate to excellent.
Hao Gong, Yiwen Yang, Zechao Wang, Chunxiang Kuang   +3 more
doaj   +1 more source

Synthesis of Naphthoquinones by Pd‐Catalyzed Heck–Matsuda Arylation of Lapachol

European Journal of Organic Chemistry, EarlyView.
Direct Heck–Matsuda arylation of lapachol enables the efficient synthesis of diverse naphthoquinones under homogeneous and heterogeneous palladium catalysis. The methodology features broad substrate scope, gram‐scale applicability, and provides a practical platform for quinone diversification.
Breno U. de Abreu, Renata G. Almeida, Ana L. C. Silveira, Leonardo A. Matos, Willian X. C. Oliveira, Maria H. Araujo, Victor F. S. Ramos, Rubem F. S. Menna‐Barreto, Chandrakant B. Nichinde, Felipe Fantuzzi, Edmond Gravel, Eric Doris, Eufrânio N. da Silva Júnior, Guilherme A. M. Jardim   +13 more
wiley   +1 more source

White‐Light‐Mediated Imidazole Catalysis Toward Terpene‐Based Thermosets

Angewandte Chemie, Volume 138, Issue 39, 21 September 2026.
White‐light irradiation enables the photoinitiator‐free curing of fully bio‐based terpene epoxy–anhydride systems. A light‐induced switch in epoxide ring‐opening selectivity leads to colorless, transparent thermosets with enhanced thermomechanical performance, revealing an unexpected pathway for sustainable terpene‐based network formation.
Chenxi Zhang, Sandra Olivero, Alice Mija, Véronique Michelet   +3 more
wiley   +2 more sources

Hindered aryl bromides for regioselective palladium-catalysed direct arylation at less favourable C5-carbon of 3-substituted thiophenes

Beilstein Journal of Organic Chemistry, 2014
The use of the congested aryl bromide 2-bromo-1,3-dichlorobenzene as coupling partner allows to modify the regioselectivity of the arylation of 3-substituted thiophene derivatives in favour of carbon C5.
Rongwei Jin, Charles Beromeo Bheeter, Henri Doucet   +2 more
doaj   +1 more source

Fast and Selective Dehydrogenative C–H/C–H Arylation Using Mechanochemistry

, 2016
A fast and site-selective biaryl synthesis via dehydrogenative C–H/C–H arylation in a ball mill was developed. In this paper, both electron-deficient oximes and electron-rich anilides quickly and under mild conditions provided arylation with various ...
Jiang-Qi He (1607992), Shao-Jie Lou (1607989), Qi Chen (144168), Yang-Jie Mao (1607986), Zhen-Yuan Xu (1607983), Dan-Qian Xu (1607977)   +5 more
core   +1 more source

Selective N‐Functionalization of Pyrazoles

European Journal of Organic Chemistry, EarlyView.
This review traces the evolution of regioselective N‐functionalization strategies for pyrazoles, a key class of nitrogen heterocycles widely used in medicinal chemistry. Due to rapid tautomerism, N‐functionalization often lacks selectivity, leading to poor and unpredictable regioisomeric outcomes.
Lucas Popek, Matthias Schrader, Christopher J. Teskey   +2 more
wiley   +1 more source