Results 81 to 90 of about 25,177 (318)
ChemPhotoChem, EarlyView.A major challenge for the use of molecular photoswitches in solar‐energy storage is finding the right balance between long storage times and large energy densities. Here, studying diarylethene switches, it is shown computationally that this challenge can be eased by using aromaticity to tailor two separate parts of a tricyclic π‐linker between the aryl
Jun Wang +4 more
wiley +1 more source
Beilstein Journal of Organic Chemistry, 2019 The LANCA three-component reaction of lithiated alkoxyallenes LA, nitriles N and carboxylic acids CA leads to β-ketoenamides KE in good to excellent yields.
Tilman Lechel +4 more
doaj +1 more source
Diazatriphenylenes and their thiophene analogues: Synthesis and applications [PDF]
, 2017 This review highlights the recent advances in the field of the synthesis of diazatriphenylenes and their structural analogues, such as phenanthrenes, fused with the thiophene ring, and naphthalenes, condensed with two thiophene rings.
Charushin, V. N. +2 more
core +1 more source
European Journal of Lipid Science and Technology, EarlyView.A set of Z‐stereoretentive olefin metathesis catalysts was tested in the synthesis of a pheromone of rice yellow stem borer (Scirpophaga incertulas)—one of the major rice pests in Asia. ABSTRACT Stereoselective olefin metathesis offers access to geometrically well‐defined C–C double bonds and is considered a promising new method for transforming plant ...
Maryana Nadirova +5 more
wiley +1 more source
Molybdenum-Catalyzed Synthesis of Nitrogenated Polyheterocycles from Nitroarenes and Glycols with Reuse of Waste Reduction By-product [PDF]
, 2017 A novel domino reduction/imine formation/intramolecular cyclization/oxidation for the efficient synthesis of pyrrolo(indolo)[1,2-a]quinoxalines and pyrrolo(indolo)[3,2-c]-quinolines from readily available nitrobenzenes and glycols is reported.
Arnáiz García, Francisco Javier +4 more
core +1 more source
European Journal of Organic Chemistry, EarlyView.Syntheses of quinoline and quinoxaline derivatives fused with phosphacycles were developed from commercially available quinolin‐6‐amine and quinoxalin‐6‐amine. Abstract Despite their potential in areas such as medicinal chemistry and organic materials, scaffolds in which quinoline and quinoxaline are fused to phosphacycles such as 1,3‐oxaphosphole, 1,3‐
Mohamed Ali Dridi +9 more
wiley +1 more source
Molecules, 2012 Chlorination with equimolar POCl3 can be efficiently achieved not only for hydroxypyrimidines, but also for many other substrates such as 2-hydroxy-pyridines, -quinoxalines, or even -amides.
Zhihua Sun +6 more
doaj +1 more source
Electrochemical Hydrogenation of N‐Heterocycles and Related Substrates: A Mini‐Review
Electrochemical Science Advances, EarlyView.ABSTRACT Catalytic hydrogenation refers to the (often) metal‐mediated addition of dihydrogen (H2) equivalents to unsaturated compounds to form new element‐hydrogen bonds. This conceptually simple reaction is ubiquitous in the production of a vast number of essential chemicals.
Esteban Garcia‐Torres +1 more
wiley +1 more source
Recent Advances in Homogeneous Metal-Catalyzed Aerobic C–H Oxidation of Benzylic Compounds [PDF]
, 2018 Csp(3)-H oxidation of benzylic methylene compounds is an established strategy for the synthesis of aromatic ketones, esters, and amides. The need for more sustainable oxidizers has encouraged researchers to explore the use of molecular oxygen.
Domínguez Pérez, Pilar Esther +3 more
core +2 more sources
Benchmark Response (BMR) Values for In Vivo Mutagenicity Endpoints
Environmental and Molecular Mutagenesis, EarlyView.ABSTRACT The benchmark dose (BMD) approach constitutes the most effective and pragmatic strategy for the derivation of a point of departure (PoD) for comparative potency analysis, risk assessment, and regulatory decision‐making. There is considerable controversy regarding the most appropriate benchmark response (BMR) for genotoxicity endpoints.
Paul A. White +8 more
wiley +1 more source