Results 11 to 20 of about 1,736 (145)
Carcinogenicity of 1,3-Butadiene
Environmental Health Perspectives, 1992 1,3-Butadiene, a high-production volume chemical used largely in the manufacture of synthetic rubber, is a multiple organ carcinogen in rats and mice. In inhalation studies conducted in mice by the National Toxicology Program, high rates of early lethal lymphomas occurring at exposure levels of 625 ppm or higher reduced the development and expression ...
R L, Melnick, C C, Shackelford, J, Huff
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Beilstein Journal of Organic Chemistry, 2010 Some novel annulated pyrido[2,3-d]pyrimidines 6 and 7 were synthesized stereoselectively by intramolecular hetero Diels–Alder reactions involving 1-oxa-1,3-butadienes.
Mohit L. Deb, Pulak J. Bhuyan
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Thermal Decomposition of Vicinal Dinitroalkanes
CHIMIA, 1988 Three sym-tetraalkyl-dinitroethanes 1-3 have been decomposed in solution at 180 to 215 °C. The alkylated 1,3-butadienes 10,12, and 13 are formed by elemination of HNO2.
Katharina Fritzsche +2 more
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(E)-1,1,1-Trifluoro-6,6-bis(4-methoxyphenyl)hexa-3,5-dien-2-one
Molbank, 2020 The title compound was obtained in high yield (84%) via the deacetylation of 3-(3,3-bis(4-methoxyphenyl)allylidene)-1,1,1,5,5,5-hexafluoro-2,4-pentanedione with K2CO3 in refluxing methanol. This previously unreported compound has been fully characterized
Victorio Cadierno
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Beilstein Journal of Organic Chemistry, 2018 In strong Brønsted acids (CF3SO3H, FSO3H, D2SO4), (arysulfonyl)allenes (ArSO2–CR1=C=CR2R3) and (arylsulfinyl)allenes (ArSO–CR1=C=CR2R3) undergo cyclization into the corresponding stable 1,2-oxathiolium ions, which were studied by means of NMR and DFT ...
Stanislav V. Lozovskiy +3 more
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Arylthio-substituierte Nitrilylide aus der Thermolyse von 4-Arylthio-3-oxazolin-5-onen
CHIMIA, 1984 Thermolysis of 4-arylthio- and 4-benzylthio-3-oxazolin-5-ones leads to arylthio- and benzylthio-substituted nitrile ylides, which undergo 1,3-dipolar cycloadditions with reactive dipolarophiles to give 5-membered aza-heterocycles (Schemes 1 and 2).
Peter Wipf, Heinz Heimgartner
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Synthesis of 6-Nitroderivatives of Oxazolo[3,2-a]-pyridines and Their Reactions with Nucleophiles
Molecules, 2003 5-Nitro-2-pyridone can be selectively N-phenacylated, and the resulting phenacylpyridones I undergo cyclization to 6-nitrooxazolo[3,2-a]pyridinium salts II.
Eugene V. Babaev, Alexander A. Bush
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Synthesis of (Thio)substituted -1,3-Butadienes and -Butenynes
Journal of the Turkish Chemical Society, Section A: Chemistry, 2019 In this study, 2H-1,1,3,4,4-pentachloro-1,3-butadiene (1) reacted with different thiols (2-Methyl-2-propanethiol 2a, Benzyl mercaptan 2b, 4-tert-butylbenzenethiol 2c, 4-Nitrothiophenol 2d) in ethanol in the presence of NaOH to afford mono-thio ...
Ayşecik Kaçmaz
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New Piperazine Derivatives Synthesized from Thio-Substituted Polyhalogeno-2-nitro-1,3-butadienes
E-Journal of Chemistry, 2010 It is known that polyhalogeno-nitro-1,3-butadienes are important starting materials for the synthesis of polyfunctionalized bioactive heterocycles.
S. Goksin Aydinli, Cemil Ibis
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4-Bromo-2H-1,3-oxazine-2,6(3H)-dione
Acta Crystallographica Section E, 2009 The title compound, C4H2BrNO3, is one of a series of three substituted oxauracils prepared as precursors in the preparation of 1-aza-1,3-butadienes. Although each structure has identical potential for N—H...O intermolecular hydrogen bonds, each
Damon Parrish +3 more
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