Showing papers on "Pyrazoline published in 1983"
Journal Article•
63 citations
TL;DR: In this paper, a new electrochromic polymeric film system consisting of a polymer, an EC dye which is pyrazoline or tetrathiafulvalene (TTF), and lithium perchlorate (LiClO4) was reported.
Abstract: This letter reports a new electrochromic polymeric film system consisting of a polymer, an electrochromic (EC) dye which is pyrazoline or tetrathiafulvalene (TTF), and lithium perchlorate (LiClO4) The electrochromic cell structure is glass/ITO/polymeric EC film/Au film The cell using pyrazoline as an EC dye exhibited yellow coloration at 10 V and the cell with TTF exhibited red coloration at 35 V These cells exhibited memory
28 citations
TL;DR: In this paper, the X-ray photoelectron spectra of pyrazole and pyrazoline derivatives are reported, and two well-resolved spectral lines with an energy difference of 1.8 eV appear in the N 1 s binding energy region, while in the case of 2-pyrazolines, only one relatively symmetrical line is detected.
20 citations
TL;DR: In this article, photo-electron spectra at variable temperatures demonstrate that the rate of thermal isomerization of pyrazoline-5-thione (1a) into methylthiopyrazole(s) in the gaseous phase is metal catalysed.
Abstract: Photoelectron spectra at variable temperatures demonstrate that the rate of thermal isomerization of pyrazoline-5-thione (1a) into methylthiopyrazole(s) in the gaseous phase is metal catalysed. Similar isomerizations of triazolethione (2a and 3a) are at best only slightly so.Furthermore, photoelectron spectra and MNDO calculations show that gaseous methylthiopyrazoles (1b and 1c) and methylthiotriazoles (2b and 2c) exist predominantly in planar form for the b isomer and in nonplanar form for the c isomer. The ΔH0 for the rotameric equilibria is 2.7–4.2 kJ•mol−1.
10 citations
Patent•
25 May 1983TL;DR: In this paper, an electrophotographic photosensitive material is provided, which has a photosensitive layer formed on an electroconductive substrate and containing a polymeric binder and an organic photoconductor.
Abstract: An electrophotographic photosensitive material is provided, which has a photosensitive layer formed on an electroconductive substrate and containing a polymeric binder and an organic photoconductor. The organic photoconductor is expressed by the formula: ##STR1##
7 citations
TL;DR: The antitubercular activity associated with pyrazoline-5-ones (1), picolinic acid hydrazide (2) and the antibacterial activity of sulphonamides (3) prompted as discussed by the authors to undertake the synthesis of 1-picolinoyl-3-methyl-4-(substituted)-pyrazoline 5-ones as new biological active agents.
Abstract: The antitubercular activity associated with pyrazoline-5-ones (1), picolinic acid hydrazide (2) and the antibacterial activity of sulphonamides (3) prompted us to undertake the synthesis of 1-picolinoyl-3-methyl-4-(substituted)-pyrazoline-5-ones (see formula) as possible new biological active agents. In view of their medicinal importance, it is thought worth-while to carry out a TLC separation of these compounds.
3 citations
Patent•
12 Aug 1983
TL;DR: A pyrazoline derivative shown by the formulaI(X is H or halogen, Y is halogen; R is alkyl, alkenyl, or alkynyl) is used as a pesticide for sanitary pests, agricultural and gardening pests, sylvan pests, pests in stored grain, etc as discussed by the authors.
Abstract: NEW MATERIAL:A pyrazoline derivative shown by the formulaI(X is H or halogen; Y is halogen; R is alkyl, alkenyl, or alkynyl) EXAMPLE:1-[N-( 4-Chlorophenyl )-N-methyl-carbamoyl]-3-( 4-difluoromethoxyphenyl)-4-phenyl-2-pyrazoline USE:An insecticide Useful as a pesticide for sanitary pests, agricultural and gardening pests, sylvan pests, pests in stored grain, etc PROCESS:A novel 3-(4-difluoromethoxyphenyl-2-pyrazoline shown by the formula II is reacted with a phenylisocyanate shown by the formula III to give a compound shown by the formula IV, which is reacted with an alkylating agent, alkenylating agent or alkynylating agent shown by the formula V (Z is I or Br) in the presence of a base to give a compound shown by the formulaI
2 citations
Patent•
30 Jul 1983
TL;DR: In this paper, the pyrazoline derivative of formulaI was obtained by reacting the novel compound of formula II with phenyl isocyanate of formula III, successively with benzyl magnesium chloride, formaldehyde and hydrazine.
Abstract: NEW MATERIAL:The pyrazoline derivative of formulaI[X is halogen; Y is H or halogen; Z is halogen, trifluoromethyl, OR, or SR (R is halogen-substituted lower alkyl)]. EXAMPLE:1-( 4-Trifluoromethoxyphenylcarbamoyl )-3-( 4-trifluoromethoxyphenyl )- 4-phenyl-2-pyrazoline. USE:Agent for controlling noxious life. Effective to control house vermin and various agricultural and horticultural vermin, forestry vermin, grain vermin, etc. PROCESS:The compound of formulaIcan be prepared by reacting the novel compound of formula II with phenyl isocyanate of formula III. The compound of formula II can be obtained by reacting the compound of formula V derived from p-cyanophenol, successively with benzyl magnesium chloride, formaldehyde and hydrazine.
2 citations
TL;DR: In this paper, a ring expansion is described, arising from a combination of eclipsing interactions and angle-strain, for cycloaddition reactions with diazomethane.
Abstract: Perfluoroalkyl groups activate double-bonds towards cycloaddition reactions with diazomethane; a novel ring expansion is described, arising from a combination of eclipsing interactions and angle-strain.
1 citations
Patent•
28 Nov 1983
1 citations
TL;DR: In this paper, a conjugated 1,3,5-triaryl-2-pyrazoline and 7H-imidazo[1,2-b]benz[de]isoquinoline-7-one groupings in the same molecule were synthesized.
Abstract: New organic luminophores that have orange-red and red luminescence and contain conjugated 1,3,5-triaryl-2-pyrazoline and 7H-imidazo[1,2-b]benz[de]isoquinoline-7-one groupings in the same molecule were synthesized. The introduction of a 2-naphthyl residue in the 1 position of the pyrazoline ring and annelation of 1,2-naphthylene or 4,5-naphthylene systems to the imidazole ring in place of the phenylene system lead to bathochromic and bathofluoric effects. The luminescence maxima of the synthesized compounds are found at 575 to 645 nm, and the quantum yields range from 0.7 to 0.9.
TL;DR: In this paper, a ring expansion is described, arising from a combination of eclipsing interactions and angle-strain, for cycloaddition reactions with diazomethane.
Abstract: Perfluoroalkyl groups activate double-bonds towards cycloaddition reactions with diazomethane; a novel ring expansion is described, arising from a combination of eclipsing interactions and angle-strain.