Results 161 to 170 of about 1,246 (203)
Journal of Agricultural and Food Chemistry, 2018 A series of novel β-carboline derivatives was designed by combining the anti-tobacco mosaic virus (TMV) lead compound tetrahydro-β-carboline ester with the hydantoin, thiohydantoin, and urea motifs.
Yuanqiong Huang +2 more
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Facile Synthesis of 5-Arylidene Thiohydantoin by Sequential Sulfonylation/Desulfination Reaction
International Journal of Molecular Sciences, 2013 The sequential sulfonylation/desulfination reactions of 5-benzylthiohydantoin with excess arylsulfonyl chlorides in the presence of triethylamine have been developed to afford a wide range of 5-arylidene thiohydantoin derivatives in moderate to excellent
Jintao Han, Hongbo Dong, Mingan Wang
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Synthesis of 5-Chloromethylene Hydantoins and Thiohydantoins
HETEROCYCLES, 2007AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Timothy A. Cernak, James L. Gleason
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Thiohydantoins. VI. Hydrolysis of 1-acyl-2-thiohydantoins: reported anomalies
Canadian Journal of Chemistry, 1968Two reports in which it was claimed that the 1-acyl group of a 1-acyl-2-thiohydantoin was not rapidly removed by dilute acid or alkali were investigated and found erroneous.
J. T. Edward, J. K. Liu
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Thiohydantoins. VII. Ionization and ultraviolet spectra of 4-thiohydantoins and 2,4-dithiohydantoins
Canadian Journal of Chemistry, 1969The acid and base dissociation constants of 5,5-pentamethylene-4-thiohydantoin, 5,5-pentamethylene-2,4-dithiohydantoin, and their 1-methyl derivatives, have been determined by ultraviolet studies in basic and acid media. In aqueous sulfuric acid the 4-thiohydantoins are protonated on oxygen at the 2-position, so that the extent of protonation varies ...
J. T. Edward, J. K. Liu
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Thiohydantoins. X. Kinetic Studies of the Acid Hydrolysis of 1-Acyl-2-thiohydantoins
Canadian Journal of Chemistry, 1972The rates of hydrolysis of 22 1-acyl-2-thiohydantoins in aqueous sulfuric acid to give 2-thiohydantoin and a carboxylic acid have been determined. In 0–90% sulfuric acid, hydrolysis takes place by an A-2 mechanism, and the rate reaches a maximum in about 70% acid.
Wayne Irvine Congdon, John Thomas Edward
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Thiohydantoins. XI Kinetic Studies of the Alkaline Hydrolysis of 1-Acyl-2-thiohydantoins
Canadian Journal of Chemistry, 19721-Acyl-2-thiohydantoins ionize in alkaline solution (pK ∼ 7). In solutions more alkaline than pH > 11 they are rapidly hydrolyzed to 2-thiohydantoin and a carboxylic acid, by attack of a hydroxide ion on the conjugate base of the 1-acyl-2-thiohydantoin.
Wayne I. Congdon, John T. Edward
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Copper(I) halide complexes of 2-thiohydantoin and 5,5-diphenyl-2-thiohydantoin
Polyhedron, 2012Abstract A series of copper(I) halide complexes formulated as [CuX(L)2] [X = Cl, Br; L = 2-thiohydantoin (th) and 5,5-diphenyl-2-thiohydantoin (dpth)] were prepared and their photophysical and thermal (TG–DTA) behaviour was investigated. Further treatment of these complexes with triphenylphosphane gave mixed-ligand compounds [CuX(L)(PPh3)2 ...
P. Aslanidis +4 more
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Acta Crystallographica Section C Crystal Structure Communications, 1998
In the title compound (1-acetyl-4-oxoimidazolidine-2-thione, C5H6N2O2S), the plane of the acetyl group forms an angle of 6.7° with the essentially planar thiohydantoin ring. N—H⋯O hydrogen bonds create quasiplanar chains of molecules along the y axis.
J. S. Casas +5 more
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In the title compound (1-acetyl-4-oxoimidazolidine-2-thione, C5H6N2O2S), the plane of the acetyl group forms an angle of 6.7° with the essentially planar thiohydantoin ring. N—H⋯O hydrogen bonds create quasiplanar chains of molecules along the y axis.
J. S. Casas +5 more
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Hydantoins, thiohydantoins, glycocyamidines—36
Tetrahedron, 1973Abstract In contrast to the α-chloroamides 1a-c which, when reacted with potassium N-cyanoanilide, furnish anomalous substitution products ( 2a-c ), the related nitrile and ester yields normal substitution products ( 3a and b ) under the same conditions.
Gy. Simig, K. Lempert, J. Tamás
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