Results 121 to 130 of about 48,033 (274)

Two‐Dimensional Layered Hydroxide Materials for Nucleophile Oxidation

open access: yesChemElectroChem
The global energy crisis highlights the need to transition from fossil fuels to sustainable, renewable sources of energy. Green hydrogen produced via renewable energy‐driven water electrolysis is an emerging alternative due to its zero emissions and high
Yuwei Yang, Dr. Nicholas M. Bedford
doaj   +1 more source

Synthesis of Large‐ and Medium‐Sized Heterobiaryl Atropisomeric Rings and Atropopeptides by Catalytic Intramolecular SNAr

open access: yesAngewandte Chemie, EarlyView.
Catalytic, intramolecular N‐heterocycle arylation by nucleophilic aromatic substitution (SNAr) is now available for synthesis of highly strained macrocycles and medium‐sized heterobiaryl atropisomeric rings, including atropopeptides. Key to the approach is the ability to generate a strong base catalytically, taking advantage of base‐embedding ...
Alireza Abbasi Kejani   +7 more
wiley   +1 more source

Carbon-silicon-switch effect in enantioselective construction of silicon-stereogenic center from silacyclohexadienones

open access: yesNature Communications
Carbon-silicon-switch strategy, replacing one specific carbon atom in organic molecules with a silicon, has garnered significant interest for developing new functional molecules.
Yu Yan   +5 more
doaj   +1 more source

Peptide splicing in the proteasome : a minimal size requirement for the nucleophile peptide

open access: yes, 2014
Peptide splicing in the proteasome : a minimal size requirement for the nucleophile ...
Vigneron, Nathalie   +1 more
core  

Z‐Retentive Enantioselective Rh‐Catalyzed Hydroarylation of E,Z‐Dienes

open access: yesAngewandte Chemie, EarlyView.
The Rh‐catalyzed hydroarylation of conjugated E,Z‐dienoates is found to proceed with high selectivity for addition to the E‐alkene unit. Mechanistic analysis of this Z‐retentive process points towards preferred binding of the E‐alkene unit to a Rh‐aryl species to give rise to the observed selectivity and that Rh‐enolate protonolysis to be turnover ...
Wesley McNutt   +4 more
wiley   +1 more source

μ₃-Oxo nucleophile formation enables efficient S N 2 hydrolysis at the trinuclear metal center in inorganic pyrophosphatase

open access: yesCommunications Chemistry
Inorganic pyrophosphatases are essential metalloenzymes for phosphate metabolism. Bacterial Family II Inorganic pyrophosphatases utilize a trinuclear metal center and exhibit higher catalytic activity than binuclear counterparts.
Saki Maruoka   +10 more
doaj   +1 more source

Bifunctional Asymmetric Catalysis:  A Tandem Nucleophile/Lewis Acid Promoted Synthesis of β-Lactams

open access: yes, 2016
We describe a superior procedure for the catalytic, asymmetric synthesis of β-lactams using a bifunctional catalyst system consisting of a chiral nucleophile and an achiral Lewis ...
Ahmed M. Hafez (2714233)   +5 more
core   +1 more source

Acyl Transfer Reactions of 2,4-Dinitrophenyl Furoates: Comparative Effects of Nucleophiles and Non-Leaving Groups

open access: yesChemistry
This study investigated the acyl group transfer reactions of 2,4-dinitrophenyl 5-substituted-2-furoates, promoted by 4-substituted phenoxides/phenols in a 20 mol% DMSO aqueous solution at 25 °C.
Sang-Yong Pyun, Seung-Taek Hong
doaj   +1 more source

Construction of boron-stereogenic BODIPYs through organo-catalyzed enantioselective formal C(sp2)–O/O–H metathesis

open access: yesNature Communications
The development of organo-catalyzed C(sp2)–O functionalization has gained significant importance in modern synthetic chemistry. However, a practical and general strategy for constructing chiral molecules via this approach remains elusive.
Jia-Le Zhang   +6 more
doaj   +1 more source

Multiple Isocyanide insertions promoted by protic and Lewis acids

open access: yesTetrahedron Chem
The protonation, or Lewis Acid complexation, of electrophiles can trigger the sequential insertion of two or more isocyanides resulting in valuable iminonitriles or heterocycles.
John Kornfeind, Fraser F. Fleming
doaj   +1 more source

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