Results 21 to 30 of about 14,504 (194)
Sustainable Pd‐Catalyzed Aminations “on Dirty Water”
Angewandte Chemie, EarlyView.Aminations, done safely yet neat, and therefore, quickly, using low levels of Pd, in “dirty water” that must contain 30% KOH; not NaOH, and not at 5%,10%, 20%, 40%, or 50% KOH. Moreover, no base sensitivity of functional groups! Very cool. Thank you, Nature.
Erfan Oftadeh +4 more
wiley +2 more sources
4-Chloro-1H-pyrrolo[2,3-d]pyrimidine
Acta Crystallographica Section E, 2012 The title compound, C6H4ClN3, is essentially planar with the pyrrole and pyrimidine rings inclined to one another by 0.79 (15)°. In the crystal, molecules are connected via pairs of N—H...N hydrogen bonds, forming inversion ...
Su-Lan Dong, Xiaochun Cheng
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Pyrimidine Dimers in the DNA of Paramecium aurelia
Biophysical Journal, 1968 The production and fate of thymine-containing pyrimidine dimers in Paramecium aurelia DNA was investigated in three experimental series: production of dimers by UV irradiation, fate of dimers in the dark, and "loss of photoreactivability of dimers." It is shown that cyclobutyl dimers are made by UV irradiation of Paramecium DNA in vivo, that because of
Sutherland, B.M. +2 more
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Acta Crystallographica Section E, 2012 In the title compound, C25H29BrN4O3S2, the benzene rings bridged by the sulfonamide group are tilted relative to each other by 63.9 (1)° and the dihedral angle between the sulfur-bridged pyrimidine and benzene rings is 64.9  ...
Mohan Kumar +5 more
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Acta Crystallographica Section E, 2012 In the title compound, C21H20BrClN4O4S2, the benzene rings bridged by the sulfonamide group are tilted relative to each other by a dihedral angle of 70.2 (1)° and the dihedral angle between the sulfur-bridged pyrimidine and benzene ...
Mohan Kumar +5 more
doaj +1 more source
(RS)-(2-Bromo-4-fluoroanilino)[2-(4,6-dimethoxypyrimidin-2-yloxy)phenyl]acetonitrile
Acta Crystallographica Section E, 2009 In the title compound, C20H16BrFN4O3, the pyrimidine and 2-bromo-4-fluorophenyl rings are twisted away from the central benzene ring, making dihedral angles of 77.7 (1) and 85.5 (1), respectively.
Yuan-xiang Li
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tert-Butyl N-{4-methyl-3-[4-(3-pyridyl)pyrimidin-2-yloxy]phenyl}carbamate
Acta Crystallographica Section E, 2009 In the molecule of the title compound, C21H22N4O3, the pyrimidine ring is oriented at dihedral angles of 0.51 (3) and 50.76 (3)° to the pyridine and benzene rings, respectively. In the crystal structure, intermolecular N&#
Shi-Gui Tang, Jian-Qiang Wang, Cheng Guo
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Methyl 4-[N-(5-bromopyrimidin-2-yl)carbamoyl]benzoate
Acta Crystallographica Section E, 2012 In the title compound, C13H10BrN3O3, the pyrimidine and benzene rings are twisted with an interplanar angle of 58.4 (1)°. The secondary amide group adopts a cis conformation with an H—N—C—O torsion angle ...
Hui-Ling Hu +3 more
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Crystal structure of 6-chloro-5-isopropylpyrimidine-2,4(1H,3H)-dione
Acta Crystallographica Section E, 2014 In the molecule of the title compound, C7H9ClN2O2, the conformation is determined by intramolecular C—H...O and C—H...Cl hydrogen bonds, which generate S(6) and S(5) ring motifs.
Nadia G. Haress +4 more
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Recognition in action: flipping pyrimidine dimers [PDF]
Journal of Molecular Recognition, 2005 DNA bases are normally sheltered within a double helix, but enzymes that modify and repair DNA gain access by flipping individual bases out of the double helix.
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