Results 121 to 130 of about 165,169 (375)

Thermochemistry of uracil and thymine revisited

The Journal of Chemical Thermodynamics, 2015
Peer ...
Vladimir N. Emel’yanenko, Rafael Notario, Sergey P. Verevkin, Sergey P. Verevkin   +3 more
openaire   +5 more sources

Ultraviolet relaxation dynamics in uracil: Time-resolved photoion yield studies using a laser-based thermal desorption source [PDF]

, 2018
Wavelength-dependent measurements of the RNA base uracil, undertaken with nanosecond ultraviolet laser pulses, have previously identified a fragment at m/z = 84 (corresponding to the C3H4N2O+ ion) at excitation wavelengths ≤232 nm.
Bockova, Jana, Crane, Stuart W., De Camillis, Simone, Eden, Samuel, Ghafur, Omair, Greenwood, Jason B., Rebelo, Andre, Ryszka, Michal, Saalbach, Lisa, Townsend, Dave   +9 more
core   +2 more sources

An Update: Enzymatic Synthesis for Industrial Applications

Angewandte Chemie International Edition, EarlyView.
Biocatalysis has become a sustainable and cost‐competitive alternative to established chemical synthesis, enabling the enzyme‐based production of not only commodity chemicals but (non‐natural) amino acids, (rare) sugars, as well as synthetic nucleotides.
Thomas Bayer, Shuke Wu, Radka Snajdrova, Kai Baldenius, Uwe T. Bornscheuer   +4 more
wiley   +1 more source

Development of Diversified Methods for Chemical Modification of the 5,6-Double Bond of Uracil Derivatives Depending on Active Methylene Compounds

Molecules, 2012
The reaction of 5-halogenouracil and uridine derivatives <strong>1</strong> and <strong>7</strong> with active methylene compounds under basic conditions produced diverse and selective C-C bond formation products by virtue of the ...
Kosaku Hirota, Hideo Inoue, Yoshinari Sawama, Yoshifumi Maki, Yasunari Monguchi, Yukio Kitade, Kanoko Ikawa, Yusuke Iida, Hironao Sajiki   +8 more
doaj   +1 more source

Integrated Chemoenzymatic Synthesis of the mRNA Vaccine Building Block N1‐Methylpseudouridine Triphosphate

Angewandte Chemie International Edition, Accepted Article.
Pseudouridine‐5’‐triphosphate (ΨTP) and the N1‐methylated derivative (m1ΨTP) are critical monomer building blocks of the currently used mRNA vaccines, yet efficient methods of their synthesis from readily accessible substrates remain underdeveloped. We herein report notably atom‐economic and high‐yielding biocatalytic route toward ΨTP (83% yield) and ...
Martin Pfeiffer, Leo Krammer, Johannes Zöhrer, Rolf Breinbauer, Bernd Nidetzky   +4 more
wiley   +1 more source

Use of a molecular beacon based fluorescent method for assaying uracil DNA glycosylase (Ung) activity and inhibitor screening

Biochemistry and Biophysics Reports, 2021
Uracil DNA glycosylases are an important class of enzymes that hydrolyze the N-glycosidic bond between the uracil base and the deoxyribose sugar to initiate uracil excision repair.
Avani Mehta, Prateek Raj, Sandeep Sundriyal, Balasubramanian Gopal, Umesh Varshney   +4 more
doaj  

Structural and Conformational Studies on Carboxamides of 5,6-Diaminouracils—Precursors of Biologically Active Xanthine Derivatives

Molecules, 2019
8-Arylethynylxanthine derivatives are potent, selective adenosine A2A receptor antagonists, which represent (potential) therapeutics for Parkinson’s disease, Alzheimer’s dementia, and the immunotherapy of cancer.
Daniel Marx, Gregor Schnakenburg, Stefan Grimme, Christa E. Müller   +3 more
doaj   +1 more source

Extension of the B3LYP - Dispersion-Correcting Potential Approach to the Accurate Treatment of both Inter- and Intramolecular Interactions

, 2013
We recently showed that dispersion-correcting potentials (DCPs), atom-centered Gaussian-type functions developed for use with B3LYP (J. Phys. Chem. Lett.
DiLabio, Gino A., Koleini, Mohammad, Torres, Edmanuel   +2 more
core   +1 more source

Ultrafast intersystem crossing dynamics in uracil unravelled by ab initio molecular dynamics

Physical Chemistry, Chemical Physics - PCCP, 2014
Surface hopping simulations of the RNA nucleobase uracil show that intersystem crossing and hence triplet states play an important role during the photorelaxation after excitation with UV light.
Martin Richter, S. Mai, P. Marquetand, L. González   +3 more
semanticscholar   +1 more source

Synthesis of Cyclobutane Analogue 4: Preparation of Purine and Pyrimidine Carbocyclic Nucleoside Derivatives

Molecules, 2019
The coupling of 2-bromo-3-benzoyloxycyclobutanone with purine under basic conditions produces two regioisomers consisting of the N-7 and N-9 alkylated products in equal amounts in their racemic forms.
Noha Hasaneen, Abdelaziz Ebead, Muhammad Murtaza Hassan, Hanan Afifi, Howard Hunter, Edward Lee-Ruff, Nadia S. El-Gohary, Azza R. Maarouf, Ali A. El-Emam   +8 more
doaj   +1 more source