Results 101 to 110 of about 1,847,339 (304)

Conformational analysis and intramolecular interactions in monosubstituted phenylboranes and phenylboronic acids

open access: yesBeilstein Journal of Organic Chemistry, 2013
A 1TSJF,H(O) coupling pathway, dictated by a hydrogen bond, in some 2-fluorobenzoic acids has been observed, while such an interaction does not occur in 2-fluorophenol. Thus, this work reports the conformational analysis of 2-fluorophenylboronic acid (1),
Josué M. Silla   +3 more
doaj   +1 more source

Evolution‐guided yeast complementation reveals functional differences in human PSPH variants

open access: yesFEBS Open Bio, EarlyView.
Ancient genomes can help guide which human genetic variants are tested experimentally. This study applies that idea to PSPH, a gene involved in serine biosynthesis, and uses high‐throughput yeast complementation to compare variant function. The findings reveal measurable differences among selected alleles and illustrate the value of evolution‐guided ...
Mauricio Campa‐Álvarez   +6 more
wiley   +1 more source

Enhancing C–N bond formation in amine carbonylation through dual hydrogen bonding catalysis under mild reaction conditions

open access: yesGreen Energy & Environment
The carbonylation of amines offers a promising route for synthesizing N-substituted carbamates with high atom economy. However, conventional catalysts exhibit limited catalytic efficiency, and the underlying proton transfer mechanism remains elusive ...
Xiang Hui   +6 more
doaj   +1 more source

Bifurcated Hydrogen-Bond-Stabilized Boron Analogues of Carboxylic Acids

open access: yes, 2019
The reactivity of a bulky m-terphenylboronic acid, DmpB­(OH)2 [1; Dmp = 2,6-bis­(2,4,6-trimethylphenyl)­phenyl], toward three different N-heterocyclic carbenes has been examined.
Meihua Zhao (685847)   +5 more
core   +1 more source

Structural studies and functional engineering of NanX: an anhydro‐sialic acid transporter from Escherichia coli

open access: yesFEBS Open Bio, EarlyView.
Biophysical characterisation shows that NanX, a membrane transport protein from the major facilitator superfamily (MFS), forms both monomers and dimers after purification. AlphaFold modelling and substrate docking provide information on residues likely involved in substrate recognition for NanX and another MFS member, NanT.
Michael C. Newton‐Vesty   +13 more
wiley   +1 more source

4-Hydroxy-1-oxo-1,2-dihydrophthalazine-6,7-dicarboxylic acid dihydrate

open access: yesActa Crystallographica Section E, 2008
In the crystal structure of the title compound, C10H6N2O6·2H2O, the OH and NH groups each serve as a hydrogen-bond donor to one acceptor site whereas the water molecules each serve as a hydrogen-bond donor to two acceptor sites. The hydrogen-bonding
Ling-Ling Liang   +2 more
doaj   +1 more source

Charting Hydrogen Bond Anisotropy [PDF]

open access: yes, 2019
Hydrogen bond (HB) is an essential interaction in countless phenomena, and regulates the chemistry of life. HBs are characterized by two main features, strength and directionality, with a high degree of heterogeneity across different chemical groups ...
Stefano, Forli, Diogo, Santos-Martins
core   +1 more source

In silico and in vitro exploration of a tyrosinase for biocatalytic production of catechols

open access: yesFEBS Open Bio, EarlyView.
Tyrosinase from Ralstonia pseudosolanacearum is a promising biocatalyst for producing valuable catechols from monophenol substrates. This tyrosinase is uniquely suited to this due to its high monophenolase : diphenolase ratio. We combined in silico docking and in vivo kinetic characterisation of this tyrosinase with 11 industrially relevant monophenols,
James Britton   +6 more
wiley   +1 more source

2-{[(Pyridin-2-yl)amino]methyl}phenol

open access: yesActa Crystallographica Section E, 2012
The planes of the aromatic rings of the title compound, C12H12N2O, are twisted by 50.33 (15)°. The phenol O atom is a hydrogen-bond donor to the pyridine N atom, resulting in the formation of an eight-membered ring in the molecule. The
Shan Gao, Seik Weng Ng
doaj   +1 more source

The Nature of the Hydrogen Bond: Models and Theories

open access: yes, 2009
D-H...:A H-bonded interactions (D and :A = H-bond donor and acceptor) display a wide interval of binding energies, E(HB), from less than one to 45 kcal/mol which, unlike normal chemical bonds, feature properties that do not simply depend on D and :A but ...
GILLI, Paola
core  

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