Results 191 to 200 of about 137,731 (206)
Some of the next articles are maybe not open access.
Reaction of Bromine with Uracils
Nature, 1957SOME interesting observations on the reaction of bromine with pyrimidine compounds were recently reported by Cohn1. Since 1907, when Wheeler and Johnson2 first observed the coloured reaction product obtained by the action of bromine with uracil or cytosine and isolated the intermediate, the bromine reaction has been utilized for structural ...
openaire +3 more sources
Structures and Fragmentation of [Cu(Uracil‐H)(Uracil)]+ in the Gas Phase
ChemPhysChem, 2011AbstractComplexes of copper (II) ions and uracil were studied using tandem mass spectrometry (Fourier transform ion cyclotron resonance, FTICR, mass spectrometry) including extensive isotopic labeling as well as theoretical calculations. Positive ion electrospray mass spectra of aqueous solutions of CuCl2 and uracil show that the [Cu(Ura‐H)(Ura)]+ ion ...
Osama Y. Ali, Travis D. Fridgen
openaire +3 more sources
Protonation and deprotonation energies of uracil Implications for the uracil–water complex
Journal of the Chemical Society, Faraday Transactions, 1998The proton affinities PA(B) of the four oxygen lone pairs and of the two nitrogen atoms and the deprotonation energies PA(A-) of the two NH bonds of uracil are calculated by density functional theory (DFT) using the 6-31G(d,p) and 6-31G++(d,p) basis set. The PAs are also calculated by abinitio MO theory (MP4) using 6-31G(d,p) for comparison.
Minh Tho Nguyen +2 more
openaire +2 more sources
DNA base stacking: The stacked uracil/uracil and thymine/thymine minima
Journal of Computational Chemistry, 2012AbstractThe potential energy surfaces of stacked uracil dimer (U/U) and stacked thymine dimer (T/T) have been explored at the counterpoise (CP)‐corrected M06‐2X/6‐31+G(d) level of theory, in the gas phase and in solution (with water and, for U/U, 1,4‐dioxane as the solvents) modeled by a continuum solvent using the polarizable continuum model ...
Ruairidh S. Hunter, Tanja van Mourik
openaire +3 more sources
ChemInform Abstract: Ozonolysis of Uracils in Water.
ChemInform, 1989Abstract The ozonolysis of uracils unsubstituted at the 1-position gave new 1-acyl-5-hydroxyhydantoins and 5-hydroxyhydantoins in water, while that of 1-substituted uracils gave the corresponding 5-hydroxyhydantoins in low yields. The structure of 1-acetyl-5-hydroxy-5-methylhydantoin was determined by X-ray crystallography.
KamiyaKazusaki +5 more
openaire +2 more sources
Effect of certain uracil analogs on incorporation of uracil into RNA
Archives of Biochemistry and Biophysics, 1958Karl E. Paschkis +2 more
openaire +3 more sources
THE MECHANISM OF PHOTOHYDRATION OF URACIL AND N‐SUBSTITUTED URACILS
Photochemistry and Photobiology, 1968J. G. Burr, E. H. Park, B. R. Gordon
openaire +2 more sources
The Direct Thiation of Uracils
Journal of the American Chemical Society, 1947Gertrude B. Elion, George H. Hitchings
openaire +2 more sources