Results 11 to 20 of about 1,986 (189)

S,O-Ligand Promoted meta-C−H Arylation of Anisole Derivatives via Palladium/Norbornene Catalysis [PDF]

open access: yesAngew Chem Int Ed Engl, 2022
Reversing the conventional site-selectivity of C−H activation processes provides new retrosynthetic disconnections to otherwise unreactive bonds. Here, we report a new catalytic system based on palladium/norbornene and an S,O-ligand for the meta-C−H ...
Fernández-Ibáñez, M.Á.   +3 more
core   +2 more sources

Conversion of Alcohols into Amides Using Alumina-Methanesulfonic Acid (AMA) in Nitrile Solvents [PDF]

open access: yesIranian Journal of Chemistry & Chemical Engineering, 1999
The reaction of tertiary, secondary and benzylic alcohols with different nitriles in the presence of alumina-methanesulfonic acid (AMA) as a new reagent affords the corresponding amides in good yields (Table 1, 2).
Hashem Sharghi, Khodabakhsh Niknam
doaj  

Group additive modeling of substituent effects in monocyclic aromatic hydrocarbon radicals [PDF]

open access: yes, 2017
The thermodynamic properties of the unsubstituted and substituted phenyl, phenoxy, anisyl, benzoyl, styryl and benzyl radicals with six substituents (hydroxy, methoxy, formyl, vinyl, methyl, and ethyl) are calculated with the bond additivity corrected ...
Benson SW.   +5 more
core   +3 more sources

Microextraction and gas chromatography/mass spectrometry for improved analysis of geosmin and other fungal "off" volatiles in grape juice [PDF]

open access: yes, 2010
Geosmin is a volatile fungal metabolite with an earthy aroma produced in grape products from rotten grapes. The accumulation of geosmin in grapes is caused by the interaction of Botrytis cinerea and Penicillium expansum.
Lima, Nelson   +5 more
core   +1 more source

Experimental and kinetic modeling study of pyrolysis and combustion of anisole [PDF]

open access: yes, 2018
open7siFast biomass pyrolysis is an effective process with high yields of bio-oil, and is a promising technology to partially replace non-renewable fossil fuels.
Faravelli, Tiziano   +6 more
core   +2 more sources

Ynones in dearomative spirocyclisation processes; a review

open access: yesTetrahedron Chem
This review concentrates on our research into the discovery of novel ynone-based dearomative spirocyclisation processes, whilst placing the new chemistry into the context of existing knowledge.
Richard J.K. Taylor, William P. Unsworth
doaj   +1 more source

Prevention and control of contaminants of industrial processes and pesticides in the poultry production chain [PDF]

open access: yes, 2002
The reduction in levels of organochlorine pesticide residues in food of animal origin in the past 30 years has been achieved especially by controlling entrance via the feed chain.
Kan, C.A.
core   +4 more sources

The furan microsolvation blind challenge for quantum chemical methods: First steps [PDF]

open access: yes, 2018
© 2018 Author(s). Herein we present the results of a blind challenge to quantum chemical methods in the calculation of dimerization preferences in the low temperature gas phase.
Al-Mogren, Muneerah M.   +27 more
core   +4 more sources

Indirect Band Edge and Chain‐Locked Linear Dichroism in the Quasi‐1D Van der Waals Antiferromagnet AgCrP2S6

open access: yesAdvanced Functional Materials, EarlyView.
AgCrP2S6 reveals a momentum‐indirect band edge (≈1.35 eV) and chain‐locked linear dichroism: the first direct transitions emerge at 1.6–1.8 eV for E||a. Resonant Raman and photoemission corroborate this assignment. In ACPS/graphene heterostructures, photocurrent turns on above ≈1.5 eV and follows the same polarization selection rules (anisotropy ≈0.53),
Oleksandr Volochanskyi   +9 more
wiley   +1 more source

Alkoxysulfonium Salts Unlock Access to New Aryl Sulfonium Salts for Cross‐Coupling

open access: yesAngewandte Chemie, EarlyView.
Hard‐to‐access (hetero)aryl sulfonium salts are prepared using stable methoxysulfonium salts in combination with the magnesiation of (hetero)aryl bromides. The approach allows access to aryl sulfonium salts bearing electron‐deficient (hetero)aryl rings, or electron‐rich aryl motifs in which the sulfonium motif resides at an alternative position on the ...
Rachel E. Brown   +4 more
wiley   +2 more sources

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