Results 151 to 160 of about 14,599 (204)

Antiviral 1,3,4-Thiadiazoles

Chemotherapy, 2009
Nine 1,3,4-thiadiazoles showed an antiviral action against Mengo virus; four of them were also active against vaccinia virus and one against fowl plague virus. Investigations with Mengo virus revealed plaque reduction, inhibition of the cytopathic effect and depression of virus multiplication, with the maximum activity after substance addition from 0–2
Marion Tonew, Elke Klimke
openaire   +2 more sources

Microwave spectra of 1,3,4-thiadiazole and [34S]1,3,4-thiadiazole. Dipole moment of 1,3,4-thiadiazole

Journal of Molecular Spectroscopy, 1962
Abstract The microwave spectra of 1, 3, 4-thiadiazole (I) and [ 34 S] 1, 3, 4-thiadiazole (II) have been recorded in the 15,000–30,000 Mc/sec region. Twelve and ten transitions, respectively, were assigned. The rotational constants of (I) are, A = 8907.51 ± 0.10, B = 5569.27 ± 0.02, and C = 3424.80 ± 0.03 Mc/sec. For (II), A = 8908.15 ± 0.20,
Børge Bak, Daniel Christensen, Lise Hansen-Nygaard, Leif Lipschitz, John Rastrup-Andersen   +4 more
openaire   +1 more source

Synthesis and Reactions of Novel 2,5-Disubstituted 1,3,4-Thiadiazoles

Synthetic Communications, 2014
The desired 1,3,4-thiadiazole compounds bearing different substituents were obtained by the cyclization of the corresponding thiosemicarbazide followed by the reaction with electrophilic reagents, such as aromatic aldehydes, isatin, phenyl isothiocyanate,
Ahmed Kamel El-Ziaty, Fatma S M Abu El-Azm, Mahmoud F Ismail   +2 more
exaly   +2 more sources

Synthesis of 1,3,4-thiadiazole oligomers

Journal of the Chemical Society, Perkin Transactions 1, 2002
AbstractFor Abstract see ChemInform Abstract in Full Text.
Van‐Duc Le, Charles W. Rees, Sivaprasad Sivadasan   +2 more
openaire   +1 more source

Microwave spectra of isotopic 1,3,4-thiadiazoles. Molecular structure of 1,3,4-thiadiazole

Journal of Molecular Spectroscopy, 1966
Abstract 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, L. Nygaard, E.J. Pedersen, J. Rastrup-Andersen   +3 more
openaire   +1 more source

1,3,4- Thiadiazoles—III

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
openaire   +1 more source

Kristallin‐flüssige 1,3,4‐Thiadiazole. I. Biphenyl‐ und terphenylanaloge 1,3,4‐Thiadiazole

Journal für Praktische Chemie, 1980
Liquid 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, J. Hauschild, H. Zaschke, H. Schubert   +3 more
openaire   +1 more source

Copper(II) complexes of 2-amino-1,3,4-thiadiazole and 2-ethylamino-1,3,4-thiadiazole

Transition Metal Chemistry, 1982
Some 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, Gian Carlo Franchini, Giorgio Peyronel   +2 more
openaire   +2 more sources

Kristallin‐flüssige 1,3,4‐Thiadiazole. II [1]. 1,3,4‐Thiadiazole mit Cyclohexanstrukturfragmenten

Journal für Praktische Chemie, 1989
Liquid 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, U. Rosenfeld, H. Zaschke, H. Stettin, H. Kresse   +4 more
openaire   +1 more source

Synthesis of Several Mesoionic 1,3,4-Thiadiazoles

Journal of Pharmaceutical Sciences, 1965
Several 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
openaire   +2 more sources