Results 71 to 80 of about 9,174 (269)
Advanced Science, EarlyView.An alternating current (AC)‐promoted, Pd‐catalyzed ortho‐aryl C─H alkynylation of 2,3‐diaryl acrylaldehydes is described. This synthetic scheme accommodates a broad substrate scope, delivering alkynylated stilbene derivatives with excellent arene site selectivity.
Junya Wang +7 more
wiley +1 more source
Iodophor-Catalyzed Disulfenylation of Amino Naphthalenes with Aryl Sulfonyl Hydrazines
MoleculesAn iodophor-catalyzed direct disulfenylation of amino naphthalenes with aryl sulfonyl hydrazines in water was developed. A series of aryl sulfides were obtained in moderate to excellent yields.
Yutong Yuan +4 more
doaj +1 more source
Evaporation Kinetics Engineering Suppressed Bimolecular Recombination in All‐Polymer Solar Cells
Advanced Science, EarlyView.In this study, phenanthrene (Ph), a volatile solid additive with a weak tendency toward self‐aggregation, is introduced as a donor‐selective morphology regulator in benchmark all‐PSC systems. The moderate evaporation kinetics of Ph enable cooperative crystallization of donors and acceptors, leading to an increased fractal dimension with reduced donor ...
Dinglong Feng +17 more
wiley +1 more source
Environmental Pollutants & Bioavailability, 2020 Polychlorinated naphthalenes (PCNs) are organochlorine compounds comprising the naphthalene ring system, in which one to eight hydrogen atoms have been substituted with chlorine atoms, yielding 75 chlorinated congeners.
Idowu Victoria Agunbiade +3 more
doaj +1 more source
Polychlorinated naphthalenes (PCNs) in Chinese forest soil: Will combustion become a major source?
, 2015 We collected O- and A-horizon soil samples in 26 Chinese mountainous forests to investigate the content, spatial pattern, and potential sources of polychlorinated naphthalenes (PCNs).
Li, Jun +7 more
core +1 more source
Enantioselective Access to Trifluoromethylated Spirocyclopropyl Heterocycles
Advanced Science, EarlyView.We report a rhodium‐catalyzed asymmetric [2+1] spirocyclopropanation of methylene azacycles with trifluoromethyl carbenes in situ derived from fluoroalkyl triftosylhydrazones. ABSTRACT Chiral spirocyclopropyl heterocycles have emerged as privileged three‐dimensional structural motifs in medicinal chemistry.
Yuanhao Zhu +9 more
wiley +1 more source
Exploration of Mechanochemical Activation in Solid-State Fluoro-Grignard Reactions
Molecules, 2020 Owing to the strength of the C−F bond, the ‘direct’ preparation of Grignard reagents, i.e., the interaction of elemental magnesium with an organic halide, typically in an ethereal solvent, fails for bulk magnesium and organofluorine ...
Isaiah R. Speight, Timothy P. Hanusa
doaj +1 more source
Dual Nickel/Photoredox‐Catalyzed Regio‐ and Enantioselective Alkenylation of Epoxides
Advanced Science, EarlyView.Ni/photoredox‐catalyzed stereoconvergent cross‐electrophile coupling of racemic epoxides with alkenyl bromides is described, affording β‐alkenyl products with up to 95% ee, excellent E‐selectivity, and complete regiocontrol. These versatile intermediates enable diverse chiral synthons; mechanistic studies suggest a halide ring‐opening followed by ...
Hongyan Lan +4 more
wiley +1 more source
]naphthalenes and the Rearranged Abietane Framework of Microstegiol via Nicholas Reaction Chemistry [PDF]
, 2009 Nicholas reactions on 2,7-dioxygenated naphthalenes give C-1 monosubstitution and C-1/C-8 disubstitution in most cases. From gamma-carbonyl cation monocondensation product 3b or alkyne-unsubstituted dicondensation product 4a, cyclohepta[de]naphthalenes ...
Green, James R. +7 more
core +1 more source
Dual pKa Lipid Nanoparticles for Lung‐tropic mRNA Delivery and pH‐Programmed Endosomal Escape
Advanced Science, EarlyView.Lipid nanoparticles’ bottleneck lies in low endosomal escape efficiency and liver‐dominant delivery after intravenous administration. To overcome these limitations, we present a stepwise pH‐programmed lipid nanoparticle system enabled by our newly synthesized ionizable lipid.
Seong Gi Lim +12 more
wiley +1 more source