Results 161 to 170 of about 18,261 (204)
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Microwave spectra of isotopic 1,3,4-thiadiazoles. Molecular structure of 1,3,4-thiadiazole
Journal of Molecular Spectroscopy, 1966Abstract The microwave spectra of 2-D-, 2-13C-, and 3-15N-1,3,4-thiadiazole, C2H2N2S, were assigned and combined with earlier measurements to give a substitution structure of 1,3,4-thiadiazole. The molecule is planar with the following structural parameters: S,C=1.721A C,N=1.302A N,N=1.371A C,H=1.077A The result is ...
B. Bak +3 more
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Tetrahedron, 1968
Abstract Some 2-aryl-5-chloro-1,3,4-thiadiazoles (I; X = Cl) were treated with several nucleophilic agents in different solvents. Displacement of chlorine by piperidine was chosen for a kinetic study in ethanol and in benzene, in the temperature range 30–60°.
A. Alemagna, T. Bacchetti, P. Beltrame
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Abstract Some 2-aryl-5-chloro-1,3,4-thiadiazoles (I; X = Cl) were treated with several nucleophilic agents in different solvents. Displacement of chlorine by piperidine was chosen for a kinetic study in ethanol and in benzene, in the temperature range 30–60°.
A. Alemagna, T. Bacchetti, P. Beltrame
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Kristallin‐flüssige 1,3,4‐Thiadiazole. I. Biphenyl‐ und terphenylanaloge 1,3,4‐Thiadiazole
Journal für Praktische Chemie, 1980Liquid Crystalline 1,3,4‐Thiadiazoles. I. Biphenyl‐ and Terphenyl Analogous 1,3,4‐ThiadiazolesThe synthesis of disubstituted 1,3,4‐ and 1,2,4‐thiadiazoles and 1,3,4‐oxadiazoles is described and their melting and clearing points are investigated. The influence of the heterocyclic ring system on the formation of crystalline liquid phases is discussed.
K. Dimitrowa +3 more
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Copper(II) complexes of 2-amino-1,3,4-thiadiazole and 2-ethylamino-1,3,4-thiadiazole
Transition Metal Chemistry, 1982Some copper(II) complexes of 2-amino-1,3,4-thiadiazole (atz) and 2-ethylamino-1,3,4-thiadiazole (eatz) have been prepared and studied by electronic, i.r. and e.p.r. spectra and by magnetochemical and conductometric methods. The CuX2 · atz (X=Cl, Br) and CuCl2 · eatz complexes are presumably six-coordinate with bridging ligand molecules and ...
Antonio C. Fabretti +2 more
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Kristallin‐flüssige 1,3,4‐Thiadiazole. II [1]. 1,3,4‐Thiadiazole mit Cyclohexanstrukturfragmenten
Journal für Praktische Chemie, 1989Liquid Crystalline 1,3,4‐Thiadiazoles. II. 1,3,4‐Thiadiazoles with CyclohexanefragmentsPreparation and liquid crystalline properties of disubstituted 1,3,4‐thiadiazoles (1 and 2) are described. The mesomorphic behaviour of the title compounds is compared with their benzoate analogues. The dielectric anisotropy of these compounds is negative.
W. Schäfer +4 more
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Synthesis of Several Mesoionic 1,3,4-Thiadiazoles
Journal of Pharmaceutical Sciences, 1965Several mesoionic 1,3,4-thiadiazoles, more properly termed anhydro-4-phenyl-5-substituted-2-thio-1-thia-3,4-diazolinium thiols, have been synthesized. Physical constants for the compounds have been determined and recorded. Preliminary screening against selected microorganisms indicated some useful inhibitory activity in vitro .
T G, Stewart, L B, Kier
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1,3,4-Thiadiazole: A Versatile Pharmacophore of Medicinal Significance
Medicinal Chemistry, 2023Abstract: The 1,3,4-thiadiazole nucleus has attracted the attention of medicinal chemists during the last decades due to its multiple pharmacological activities, such as antiviral, anticancer, antibacterial, and anticonvulsant activity. This scaffold's structural alteration could aid in developing novel therapeutically effective drugs.
Madhu, Bala +4 more
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Syntheses of arylsulfonyl‐1,3,4‐thiadiazoles
Journal of Heterocyclic Chemistry, 1996AbstractReaction of sodium arylsulfinate with 2‐aryl‐5‐chloro‐1,3,4‐thiadiazole gave 2‐aryl‐5‐arylsulfonyl‐1,3,4‐thiadiazole (3) in good yield. Starting from readily available 2‐amino‐5‐benzylmercapto‐1,3,4‐thiadiazole compound 7 was obtained in three steps in moderate yield.
A. Shafiee, A. Foroumadi
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1,3,4-THIADIAZOLES FROM THIOSEMICARBAZIDES
Phosphorus, Sulfur, and Silicon and the Related Elements, 1991Abstract A new method for the synthesis of 1,3,4-thiadiazoles is described. Thus condensation of 4-methyl-4phenyl-3-thiosemicarbazide with an aldehyde or ketone affords 1,1-disubstituted-6-[1-(arylethylidine) amino] −2,5-dithiobiureas, rather than the anticipated 4,4-disubstituted-3-thiosemicarbazones.
John P. Scovill +3 more
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