Results 21 to 30 of about 540,123 (267)
Synthesis of 2H-Chromenones from Salicylaldehydes and Arylacetonitriles
Molecules, 2017 An efficient and convenient protocol for the synthesis of 2H-chromenones has been developed. In the presence of tBuOK in DMF, good to excellent yields of various chromenones were obtained from the corresponding salicylaldehydes and arylacetonitriles.
Chengcai Li +4 more
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Metal-Free Organocatalysis [PDF]
Catalysts, 2018 Fostering research in fundamental organic transformations is of utmost importance for the development of science.[...]
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Production of Metal-Free Diamond Nanoparticles [PDF]
ACS Omega, 2018 In this paper, the controlled production of high quality metal-free diamond nanoparticles is demonstrated. Milling with tempered steel is shown to leave behind iron oxide contamination which is difficult to remove. Milling with SiN alleviates this issue but generates more non diamond carbon. Thus the choice of milling materials is critically determined
Laia Ginés +7 more
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Metal-Free Regiodivergent Addition of Carbon Nucleophiles to α,β-Unsaturated Electrophiles
Molecules, 2017 A mild and metal-free regiodivergent addition of carbon nucleophiles to α,β-unsaturated electrophiles was developed. Total 1,2-regioselectivity was observed in the addition of nitrobenzyl chloride derivative 1 to α,β-unsaturated aldehydes 2 in the ...
Cédric Spitz +3 more
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Metal-Free Aminohalogenation of Quinones With Alkylamines and NXS at Room Temperature
Frontiers in Chemistry, 2022 A simple and practical strategy for intermolecular aminohalogenation of quinone with alkyl amines and NXS was developed, in which haloamines generated in situ were employed as bifunctional reagents.
Jia Li, Yu-An Li, Ge Wu, Xu Zhang
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MoleculesWe report a green and efficient visible-light-driven method for the arylation and alkylation of quinoxalin-2(1H)-ones and quinolines. This catalyst-free process utilizes air as the oxidant, offering mild reaction conditions, environmental sustainability,
Renjun Tan +3 more
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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
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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 +3 more
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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 +4 more
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Transition‐Metal‐Free Cleavage of CO [PDF]
Chemistry – A European Journal, 2017 AbstractTertiary silane 1H, 2‐[(diphenylsilyl)methyl]‐6‐methylpyridine, reacts with tris(pentafluorophenyl)borane (BCF) to form the intramolecular pyridine‐stabilized silylium 1+‐HBCF. The corresponding 2‐[(diphenylsilyl)methyl]pyridine, lacking the methyl‐group on the pyridine ring, forms classic N(py)→B adduct 2H‐BCF featuring an intact silane Si−H ...
Devillard, Marc +3 more
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