α-Trichloromethylsulfonyl-5-nitro-2-furaldehydes, a new type of SH-group uncouplers and intermediates in the synthesis of 5-nitro-2-furylarylnitrilimines

1985 ◽  
Vol 50 (2) ◽  
pp. 357-364 ◽  
Author(s):  
Adolf Jurášek ◽  
Jaroslav Kováč ◽  
Radoslav Palovčík ◽  
Ľuboš Mazag
Keyword(s):  
Uv Spectra ◽  
Sh Group ◽  
New Type ◽  
Nmr Methods ◽  
C Nmr ◽  
Stimulation Of ◽  
Ir And Uv Spectra

Trichloromethylsulfonyl-5-nitro-2-furaldehyde 4-X-phenylhydrazones I (X = H, CH3, Cl, CN, NO2, COOC2H5) were obtained by reacting 4-X-phenyldiazonium salts with 5-nitrofurfuryltrichloromethyl sulfone. These compounds react with diazomethane and trimethylamine to give the corresponding N-methylated derivatives and nitrilimines, respectively, the latter under elimination of trichlorosulfinic acid. The hydrazone-diaziridine tautomerism was studied by 1H, 15N, and 13C NMR methods; also the IR and UV spectra of the compounds synthesized are discussed. All hydrazones showed a very strong effect on the stimulation of mitochondria respiration and constitute a new type of SH-group uncouplers acting already in a 10-8 mol l-1 concentration.

Thermal cyclocondensations of 3-N(4- and 5-benzimidazolyl and benztriazolyl)amino derivatives of 2-propenoic acid

1987 ◽  
Vol 52 (12) ◽  
pp. 2918-2925 ◽  
Author(s):  
Viktor Milata ◽  
Dušan Ilavský
Keyword(s):  
Uv Spectra ◽  
Propenoic Acid ◽  
Amino Derivatives ◽  
Derivatives Of ◽  
C Nmr ◽  
Ir And Uv Spectra

The cyclization of 3-N(4- and 5-benzimidazolyl and benztriazolyl)amino-2-cyano- and 2-ethoxycarbonyl-2-propenoate esters Ia, b-IVa, b under the conditions of the Gould-Jacobs reaction leads to angularly ring-fused substituted imidazo or triazolo[4,5-f] (V, VI) and [4,5-h] (VII, VIII) quinolines, respectively. The esters Vb-VIIIb have been transformed into the corresponding chloroderivatives Vc-VIIIc. 3-N(5-Benzimidazolyl and 5-benztriazolyl)amino-2-cyano-2-propenenitriles are cyclized in the presence of aluminium(III) chloride to give the aminoquinolines Vd, VId. The structure of the products has been characterized by their 1H, 13C NMR, IR, and UV spectra.

Syntheses, spectral properties and pesticide activity of O-ethyl-S-propyl-O-(1-alkyl, phenyl-5-chloro, alkoxy-6-oxo-1H-pyridazine-4-yl)esters of dithiophosphoric acid

1980 ◽  
Vol 45 (8) ◽  
pp. 2247-2253 ◽  
Author(s):  
Václav Konečný ◽  
Štefan Varkonda ◽  
Vojtech Kubala
Keyword(s):  
Spectral Properties ◽  
Uv Spectra ◽  
Dithiophosphoric Acid ◽  
Insecticide Activity ◽  
Ir And Uv Spectra

Syntheses of O-ethyl-S-propyl-O-(1-alkyl, phenyl-5-chloro, alkoxy-6-oxo-1H-pyridazine-4-yl) esters of dithiophosphoric acid are described. The compounds were investigated for their IR and UV spectra and for their contact and system activities as insecticides, acaricides, ovicides, fungicides and herbicides. Some of the compounds proved efficient acaricides; compound VIII also had an insecticide activity.

IR and UV spectra of complexes of N-vinylazoles with organohalostannanes

1973 ◽  
Vol 9 (12) ◽  
pp. 1517-1521
Author(s):  
N. N. Chipanina ◽  
N. I. Shergina ◽  
Yu. N. Ivlev ◽  
E. S. Domnina ◽  
D. D. Taryashinova ◽  
...  
Keyword(s):  
Uv Spectra ◽  
Ir And Uv Spectra

A new type of crown ether. III. Triethylene glycolic diester of naphthalene dithioglycolic acid

1983 ◽  
Vol 61 (8) ◽  
pp. 1756-1759
Author(s):  
Lidia Prajer-Janczewski ◽  
Krystyna Rudolk ◽  
Tadeusz Lis ◽  
Marian Janczewski ◽  
Janina Biskup
Keyword(s):  
Mass Spectrometry ◽  
Crown Ether ◽  
Crystalline State ◽  
Structural Investigation ◽  
X Ray ◽  
New Type ◽  
C Nmr

The structure of 2,7-(11,22-diono-12, 15,18.21-tetroxa-9,24-dithia)-hexadecylene-naphthalene was investigated by 1H and 13C nmr and mass spectrometry. An X-ray structural investigation indicated the dissymmetric ansa structure of this compound in the crystalline state.

scholarly journals A New Type of a Sol-Gel-Derived Inorganic-Organic Nanocomposite

1994 ◽  
Vol 346 ◽  
Author(s):  
Reiner Kasemann ◽  
Helmut K. Schmidt ◽  
Elisabeth Wintrich
Keyword(s):  
Polyethylene Oxide ◽  
Sol Gel ◽  
Scratch Resistance ◽  
Nano Composites ◽  
Nano Scale ◽  
The Matrix ◽  
New Type ◽  
Transparent Polymers ◽  
Molecular Dimensions ◽  
C Nmr

ABSTRACTA new type of sol-gel-based transparent inorganic-organic nano composites has been developed by increasing the inorganic phase dimension to values just below the point, where scattering can be neglected. For this purpose, nanosized boehmite particles ≤ 50 nm are homogeneously incorporated in a sol based on tetraethoxysilane and an epoxysilane. The nano-scale boehmite particles act as catalysts for the polymerization of the epoxy silane to polyethylene oxide, as proved by 13C NMR, and are linked to the matrix by Si-O-Al bridges, as proven by 27Al-NMR spectroscopy. The synthesized sols can be applied by standard coating techniques on transparent polymers and are cured thermally. The mechanical properties (scratch resistance, hardness) have been substantially improved compared to systems with molecular dimensions of the inorganic phase. The effect is attributed to the special structure of flexibly suspended nano-scale boehmite particles in an inorganic-organic network by a tailored interface.

Notizen: A New Type of Phenylpropane from the Essential Fruit Oil of Pimpinella anisum L.

1976 ◽  
Vol 31 (2) ◽  
pp. 283-284 ◽  
Author(s):  
K.-H. Kubeczka ◽  
F. Von Massow ◽  
V. Formacek ◽  
M. A. R. Smith
Keyword(s):  
Essential Oil ◽  
Butyric Acid ◽  
Acid Ester ◽  
Nmr Spectra ◽  
Pimpinella Anisum ◽  
Unknown Type ◽  
New Type ◽  
Fruit Oil ◽  
C Nmr

From the essential oil of Pimpinella anisum fruits a hitherto unknown type of phenylpropane was isolated. The mass, infrared, and 13C NMR spectra indicate, that the unknown is a 2-methyl-butyric acid ester of 2-hydroxy-5-methoxy-trans-propenylbenzene.

Conformers of Saturated Chains: Matrix Isolation, Structure, IR and UV Spectra of n -Si4 Me10

1996 ◽  
Vol 2 (5) ◽  
pp. 529-538 ◽  
Author(s):  
Bo Albinsson ◽  
Hiroyuki Teramae ◽  
John W. Downing ◽  
Josef Michl
Keyword(s):  
Matrix Isolation ◽  
Uv Spectra ◽  
Ir And Uv Spectra

IR and UV spectra of enamino ketones of the 8-azasteroid series

1980 ◽  
Vol 33 (3) ◽  
pp. 956-960
Author(s):  
N. I. Garbuz ◽  
V. Z. Kurbako ◽  
F. A. Lakhvich ◽  
L. G. Lis
Keyword(s):  
Uv Spectra ◽  
Enamino Ketones ◽  
Ir And Uv Spectra

The synthesis, spectral properties and pesticidal activity of O-(1-benzyl, cyclohexyl, methyl-5-ethoxy, methoxy, methylthio-6-oxo-1H-pyridazin-4-yl) esters of phosphoric, thiophosphoric and thiophosphonic acids

1979 ◽  
Vol 44 (6) ◽  
pp. 1761-1771 ◽  
Author(s):  
Václav Konečný ◽  
Štefan Varkonda
Keyword(s):  
High Activity ◽  
Spectral Properties ◽  
Uv Spectra ◽  
Ovicidal Activity ◽  
Cyclohexyl Methyl ◽  
Ir And Uv Spectra

The synthesis of O-(5-ethoxy-1-methyl-6-oxo-1H-pyridazin-4-yl), O-(5-methoxy-1-benzyl-6-oxo-1H-pyridazin-4-yl), O-(5-methylthio-1-methyl-6-oxo-1H-pyridazin-4-yl) and O-(5-methoxy-1-cyclohexyl-6-oxo-1H-pyridazin-4-yl) esters of phosphoric, thiophosphoric and thiophosphonic acids is described. The IR and UV spectra of the synthetized compounds were measured and interpreted and their contact and systemic insecticidal, acaricidal and ovicidal activity was determined. Several of the compounds tested displayed high activity.

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