Results 41 to 50 of about 4,159,820 (313)

Recent Advances in Metal-Free Quinoline Synthesis

Molecules, 2016
The quinoline ring system is one of the most ubiquitous heterocycles in the fields of medicinal and industrial chemistry, forming the scaffold for compounds of great significance.
Ginelle A. Ramann, Bryan J. Cowen
doaj   +1 more source

Recent Advances and Challenges in 2D Metal-Free Electrocatalysts for N2 Fixation

Frontiers in Chemistry, 2020
The ever-growing requirement of ammonia for industry and energy supply motivates people to find clean and cost-effective alternatives to overcome the shortcomings of the century-old Haber-Bosch process. Electrocatalytic N2 reduction (NRR) is considered a
Xinyuan Xia, Bin Li, Shanshan Liu, Bo Tang   +3 more
doaj   +1 more source

Metal-Free Phosphated Mesoporous SiO₂ as Catalyst for the Low-Temperature Conversion of SO₂ to H₂S in Hydrogen

Nanomaterials, 2021
Highly active metal-free mesoporous phosphated silica was synthesized by a two-step process and used as a SO2 hydrogenation catalyst. With the assistance of a microwave, MCM-41 was obtained within a 10 min heating process at 180 °C, then a low ratio of P
Xinnan Lu, Safa Gaber, Mark A. Baker, Steven J. Hinder, Kyriaki Polychronopoulou   +4 more
doaj   +1 more source

Metal-Free Cascade Formation of C–C and C–N Bond for the Construction of 3-Cyano-2-Pyridones with Insecticidal Properties

Molecules
A straightforward and efficient methodology has been developed for the synthesis of 3-cyano-2-pyridones via the C–C and C–N bond formation processes. A total of 51 diverse 3-cyano-2-pyridone derivatives were obtained in moderate to excellent yields. This
Yao Tang, Nvjiang Wu, Junyu Xu, Xiaopo Zhang, Youbin Li, Xuesong Wang   +5 more
doaj   +1 more source

Recent Advances in Transition-Metal-Free Late-Stage C-H and N-H Arylation of Heteroarenes Using Diaryliodonium Salts

Pharmaceuticals, 2021
Transition-metal-free direct arylation of C-H or N-H bonds is one of the key emerging methodologies that is currently attracting tremendous attention. Diaryliodonium salts serve as a stepping stone on the way to alternative environmentally friendly and ...
Thierry Besson, Corinne Fruit
doaj   +1 more source

Reactive Plasma N-Doping of Amorphous Carbon Electrodes: Decoupling Disorder and Chemical Effects on Capacitive and Electrocatalytic Performance

Frontiers in Chemistry, 2020
Nitrogen-free amorphous carbon thin films prepared via sputtering followed by graphitization, were used as precursor materials for the creation of N-doped carbon electrodes with varying degrees of amorphization.
Md. Khairul Hoque, James A. Behan, James Creel, James G. Lunney, Tatiana S. Perova, Paula E. Colavita   +5 more
doaj   +1 more source

Metal-Free Fabrication of Fused Silica Extended Nanofluidic Channel to Remove Artifacts in Chemical Analysis

Micromachines, 2021
In microfluidics, especially in nanofluidics, nanochannels with functionalized surfaces have recently attracted attention for use as a new tool for the investigation of chemical reaction fields.
Kyojiro Morikawa, Ryoichi Ohta, Kazuma Mawatari, Takehiko Kitamori   +3 more
doaj   +1 more source

Metal‐Free Intermolecular Aminoarylation of Alkynes

Angewandte Chemie, 2017
AbstractA metal‐free aminoarylation of internal alkynes is described, yielding tetrasubstituted enaminoates. The transformation proceeds in good to excellent yields through a tandem conjugate addition/Smiles rearrangement involving aryl and heteroaryl sulfonamides.
Pauline T. G. Rabet, Scott Boyd, Michael F. Greaney   +2 more
openaire   +4 more sources

Solvent-Free Synthesis of Metal-Organic Frameworks Using Low-Melting Metal Salts [PDF]

, 2022
Metal-organic frameworks (MOFs) are porous, crystalline materials constructed from organic linkers and inorganic nodes with myriad potential applications in chemical separations, catalysis, drug delivery, and beyond.
Tristan, Pitt, Phillip, Milner, Kyle, Lancaster, Melissa, Bollmeyer, Tyler, Azbell, Christina, Cong   +5 more
core   +1 more source

Sustainable, Oxidative, and Metal‐Free Annulation

Chemistry – A European Journal, 2017
AbstractAnnulation has received steadily growing interest in the interplay with the increasing emphasis towards selective C−H bond functionalization reactions. Metal‐free oxidative annulation through functionalization of inert and abundant C−H bonds offers great improvements in terms of atom‐ and step‐economics as well as reduced waste production under
Luis Bering, Srimanta Manna, Andrey P. Antonchick   +2 more
openaire   +4 more sources