SOME ACENAPHTHENE COMPOUNDS

1957 ◽  
Vol 35 (4) ◽  
pp. 351-357 ◽  
Author(s):  
E. H. Charlesworth ◽  
H. Campbell ◽  
J. J. Conn ◽  
C. T. Elston ◽  
D. L. Stachiw
Keyword(s):  
Hypochlorous Acid ◽  
Geometric Isomer ◽  
Reaction Products ◽  
Derivatives Of

A new geometric isomer of 1,2-dichloroacenaphthene has been isolated among the reaction products of acenaphthylene and hypochlorous acid. Some new derivatives of acenaphthenone and acenaphthenol are reported.

Photoreaktionen von Dekacarbonyldirhenium mit Allen und unverzweigten Allenderivaten / Photoreactions of Decacarbonyldirhenium with Allene and Unbranched Derivatives of Allene

1995 ◽  
Vol 50 (4) ◽  
pp. 649-660 ◽  
Author(s):  
Cornelius G. Kreiter ◽  
Wolfgang Michels ◽  
Gerhard Heeb
Keyword(s):  
Nmr Spectra ◽  
Crystal And Molecular Structure ◽  
Reaction Products ◽  
X Ray Diffraction ◽  
X Ray ◽  
H Nmr ◽  
Oxidative Rearrangement ◽  
Dirhenium Complexes ◽  
Derivatives Of ◽  
By Products

Decacarbonyldirhenium (1) reacts upon UV irradiation with allene (2), 1,2-butadiene (3) and 2,3-pentadiene (4) preferentially by CO substitution and oxidative rearrangement to the corresponding enneacarbonyl-μ-η1:3-endiyl-dirhenium complexes 5, 9, and 15 and to the octacarbonyl-μ-η2:2-allene-dirhenium complexes 6, the stereoisomers 10, 11, and 16. At elevated temperature 5, 9, and 15 loose CO and yield by a reductive rearrangement also the complexes 6, 10, 11, and 16. In addition to these main products, depending upon the allene derivative used, various by-products are obtained.By-products of the reaction o f 1 with 2 are octacarbonyl-μ-η3:3-(2,3-dimethylene-buta-1,4- diyl)dirhenium (7) and μ-η2:2-allene-hexacarbonyl-μ-η1:3-1-propene-1,3-diyl-dirheniurn (8). The photo reaction of 1 with 3 yields, in addition to 9-11, tetracarbonyl-η3-(E-5-ethylidene- 4-methyl-2-cyclopenten-1-yl)rhenium (12) and tetracarbonyl-η3-(Z-5-ethyliden-4- methyl-2-cyclopenten-1-yl)rhenium (13) as a mixture of isomers. 1 and 4 form the by-products tetracarbonyl-η3-(EZ-3-penten-2-yl)rhenium (17), tetracarbonyl-η3-(EE-3-penten-2-yl)rhenium (18) and heptacarbonyl-μ-η1:2:1:2-(4,5-dimethyl-2,6-octadiene-3,6-diyl)dirhenium (19) with an unusually bridging and chelating ligand. The constitutions of the reaction products have been concluded from the IR and 1H NMR spectra. For 19 the crystal and molecular structure has been determined by X-ray diffraction analysis.

A monoclonal antibody recognizing the chlorohydrin derivatives of oleic acid for probing hypochlorous acid involvement in tissue injury

Redox Report ◽  
1997 ◽  
Vol 3 (2) ◽  
pp. 111-117 ◽  
Author(s):  
N. M. Domigan ◽  
A. C. Carr ◽  
J. G. Lewis ◽  
P. A. Elder ◽  
C. C. Winterbourn
Keyword(s):  
Monoclonal Antibody ◽  
Oleic Acid ◽  
Hypochlorous Acid ◽  
Tissue Injury ◽  
Derivatives Of

ÉTUDES SUR LA SYNTHÈSE DE L’HYDROXYPROLINE À PARTIR DE DÉRIVÉS DE L’ACIDE 2-AMINO-4-PENTÈNOÏQUE

1956 ◽  
Vol 34 (4) ◽  
pp. 502-514 ◽  
Author(s):  
Roger Gaudry ◽  
Louis Berlinguet ◽  
André Langis ◽  
Gérard Paris
Keyword(s):  
Double Bond ◽  
Acid Hydrolysis ◽  
Malonic Acid ◽  
Systematic Investigation ◽  
Carboxyl Group ◽  
Reaction Products ◽  
Pentanoic Acid ◽  
Copper Salts ◽  
Halogenation Reaction ◽  
Derivatives Of

A systematic investigation of the synthesis of 4-hydroxy-DL-proline and 2-amino-4-dihydroxyvaleric acid has been made, starting from the following derivatives of 2-amino-4-pentenoic acid: ethyl allylacetamidomalonate, ethyl allylacetamidocyanoacetate, 2-phthalimidopentenoic acid, allylacetamido-malonic acid, acetylallylglycine, 5-allylhydantoin, and 3-phenyl-5-allylhydantoin. Chlorine or bromine was added to the double bond of these compounds, and the reaction products were either derivatives of 5-halogenated-4-valerolactones or derivatives of 4,5-dihalogenated pentanoic acids, depending on whether the carboxyl group of the pentanoic acid was free or not when the halogenation reaction was carried out. Acid hydrolysis followed by treatment with barium hydroxide always gave mixtures, in different ratio, of 4-hydroxy-DL-proline and 2-amino-4,5-dihydroxyvaleric acid which were analyzed and isolated as the copper salts. In the case of 5-(2,3-dibromopropyl)hydantoin and 3-phenyl-5-(2,3-dibromopropyl)hydantoin, no cyclization could be obtained.

CYCLOHEXANONE-BENZIL

1931 ◽  
Vol 4 (3) ◽  
pp. 264-274 ◽  
Author(s):  
Charles F. H. Allen
Keyword(s):  
Free Radical ◽  
Chemical Property ◽  
Addition Product ◽  
Sodium Methylate ◽  
Reaction Products ◽  
Mineral Acids ◽  
Derivatives Of

In the presence of a small amount of sodium methylate, cyclohexanone and benzil form an addition product, which is a "semicyclic" 1:4-diketone. No derivatives of a bicyclic cyclo-heptane were found. Its most conspicuous chemical property is its sensitivity to mineral acids; among the reaction products is found a diphenyltetrahydrocumarone. Although the addition product exhibits the phenomenon of halochromism, the existence of a perchlorate is doubtful, and it did not form a free radical.

23.—The Synthesis of Derivatives of Acenaphthenone

1974 ◽  
Vol 71 (4) ◽  
pp. 279-283 ◽  
Author(s):  
Michael J. Bedford ◽  
Douglas A. Crombie
Keyword(s):  
Polymeric Material ◽  
Malonic Acid ◽  
Hydroxy Acid ◽  
Ethyl Cyanoacetate ◽  
Geometric Isomer ◽  
Unsaturated Ester ◽  
Image Position ◽  
Derivatives Of

Acenaphthenequinone (I) condensed with ethyl cyanoacetate in ethanol to give the unsaturated ester (IIIb) while condensation with malonic acid in toluene in the presence of diethylamine gave the hydroxy acid (IIa). Esterification of this acid gave an ester (IIb) which could also be obtained by condensation of acenaphthenequinonewith ethyl hydrogen malonate. The acid (IIa) on dehydration gave 2-oxo-Δ1,α-acenaphtheneacetic acid (IIIa) of m.p. 230°C. This result seems to be in conflict with that of Rodionov and Federova (1950) who reported a m.p. of 160° for the acid (IIIa) which they obtained directly by condensation of acenaphthenequinone with malonic acid in ethanol in the presence of ammonia. Our efforts to repeat their result gave only impure polymeric material and it seems unlikely, therefore, that their product was simply the geometric isomer of our acid.

scholarly journals SYNTHESIS AND RESEARCH OF NITROGEN-CONTAINING XANTHANE GUM DERIVATIVES

2020 ◽  
Vol 9 (5(74)) ◽  
pp. 57-62
Author(s):  
O.R. Ahmedov ◽  
N.Sh. Rahmatova ◽  
H.S. Talipova ◽  
Z.S. Alihonova ◽  
A.S. Turaev
Keyword(s):  
Xanthan Gum ◽  
Condensation Reaction ◽  
Oxidation States ◽  
Reaction Products ◽  
Scanning Calorimetry ◽  
Quantitative Content ◽  
Degree Of Oxidation ◽  
Physicochemical Methods ◽  
Aldehyde Groups ◽  
Derivatives Of

This study presents the results concerning the synthesis of nitrogen-containing derivatives of xanthan gum. The authors obtained xanthan gum derivatives with various oxidation states through the preliminary reaction of periodic oxidation of the polysaccharide. Through the physicochemical methods of analysis, the structure and established quantitative content of aldehyde groups in the macromolecular chain of the polysaccharide were proved. It was possible to carry out a condensation reaction with guanidine and to synthesize new macromolecular derivatives in the presence of reactive aldehyde groups in the structure of xanthan gum. The synthesized derivatives were further investigated through IR spectroscopy, thermogravimetry, differential scanning calorimetry, and elemental analysis for nitrogen content. Furthermore, it is found that the amount of guanidine and the degree of substitution in the synthesized compounds are 15.3-39.0% and 34-85 mol.%. Finally, when using modified xanthan gum with a different degree of oxidation it is possible to vary the quantitative content of guanidine and the degree ofsubstitution in the reaction products.

scholarly journals Synthesis, Spectroscopic, and Antimicrobial Studies of Binuclear Metallocene (M = Ti, Zr, or Hf) Derivatives of Bis(mercaptoazoles)

2007 ◽  
Vol 2007 ◽  
pp. 1-9 ◽  
Author(s):  
Shilpi Sinha ◽  
Akhilesh Kumar Srivastava ◽  
Chandra Mohan Tripathi ◽  
Om Prakash Pandey ◽  
Soumitra Kumar Sengupta
Keyword(s):  
Mass Spectra ◽  
Electrical Conductance ◽  
Molar Ratio ◽  
Binuclear Complexes ◽  
Reaction Products ◽  
Bacterial Strains ◽  
Antimicrobial Studies ◽  
Derivatives Of ◽  
Fab Mass Spectra ◽  
Growth Inhibiting

The reactions of(η5−C5H5)2MCl2(M = Ti, Zr, or Hf) with mercaptoazoles(LH2), namely, bis(mercaptotriazoles), bis(mercap-tooxadiazoles), and bis(mercaptothiadiazoles) in 2 : 1 molar ratio, respectively, have been studied in dry tetrahydrofuran in the presence ofn-butylamine and the binuclear complexes of the type[{(η−C5H5)2M}2(L)](M = Ti/Zr/Hf) are obtained. Tentative structural conclusions are drawn for the reaction products based upon elemental analysis, electrical conductance, magnetic moment, and spectral data (UV-Vis, IR,H1NMR, andC13NMR). FAB-mass spectra of few complexes of each series were also carried out to confirm the binuclear structures. Studies were conducted to assess the growth-inhibiting potential of the complexes synthesized, and the ligands against various fungal and bacterial strains.

Synthesis of Some Naphthothiadiazolophanes. Derivatives of 4,10,14-Ethenylylidene-7H-[1,2,3]thiadiazolo[5,4-e]azacyclotridecine and 4,11,15-Ethenylylidene[1,2,3]thiadiazolo[5,4-f]azacyclotetradecine

1989 ◽  
Vol 42 (11) ◽  
pp. 1951 ◽  
Author(s):  
JB Bremner ◽  
W Jaturonrusmee
Keyword(s):  
Potassium Carbonate ◽  
Cyanogen Bromide ◽  
Diels Alder ◽  
Reaction Products ◽  
Analogous Structure ◽  
Derivatives Of

Reaction of 7,8-dimethoxy-1,2,4,5,1lb, 11c-hexahydrobenzo [de]pyrrolo[3,2,1-ij][1,2,3]thiadiazolo[4,5-g]quinoline (3a) and 8,9-dimethoxy-2,3,5,6,12b,12c-hexahydro-1H-[1,2,3]thiadiazolo-[5',4':3,4]naphtho[2,1,8-ijalquinoline (3b) with cyanogen bromide in the presence of potassium carbonate gave the naphthothiadiazolophanes 12,13-dimethoxy-5,6,8,9-tetrahydro-4,10,14- ethenylylidene-7H-[1,2,3]thiadiazolo[5,4-e]azacyclotridecine-7-carbonitrile (4a) and 13,14-di-methoxy-6,7,9,10-tetrahydro-4,11,15-ethenylylidene[1,2,3]thiadiazolo[5,4-f]azacyclotetradecine-8(5H)-carbonltrile (4b) in 39 and 89% yield respectively;7-(2-bromoethyl)-1,2-dimethoxy-5,6,6a,7-tetrahydro-4H-benzo[de][1,2,3]thiadiazolo[4,5-g]quinoline-6-car bonitrile (5a) was also obtained in 40% yield from the former reaction. Products of analogous structure resulted from (3a,b) when methyl chloroformate was used In place of cyanogen bromide. Attempted Diels-Alder reactions of (4b,c) with some powerful dienophiles were unsuccessful.

Titanocene derivatives of purine and adenine. Synthesis and characterization of reaction products with (η5-C5H5)2Ti(CO)2, (η5-C5H5)2TiCl, and (η5-C5H5)2TiCl2

1986 ◽  
Vol 64 (4) ◽  
pp. 751-759 ◽  
Author(s):  
Daniel Cozak ◽  
Abdelhakim Mardhy ◽  
André Morneau
Keyword(s):  
Carbon Monoxide ◽  
Metal Complex ◽  
Elemental Analysis ◽  
Synthesis And Characterization ◽  
Reaction Products ◽  
First Order ◽  
H Nmr ◽  
New Compounds ◽  
Derivatives Of

The reaction of CpTi(CO)2 (1), Cp2TiCl (2), and Cp2TiCl2 (3) (Cp = η5-C5H5) with purine (PuH) and adenine (AdH) in organic solvents is described. The compound 1 reacts with both molecules in an oxidative fashion giving Cp2Ti(C5H3N4)(C5H4N4) (4) and (Cp2Ti)2(C5H3N5) (5) with concomitant liberation of molecular carbon monoxide and hydrogen (4:1) following a first order rate law in metal complex. The compound 2 forms an adduct compound Cp2TiCl(C5H4N4) (6) with PuH. Monosubstituted derivatives Cp2TiCl(C5H3N4) (7) and Cp2TiCl(C5H4N5) (8) are formed from the reaction of the deprotonated bases with 3. In addition to the usual elemental analysis, the characteristic ir, 1H nmr, epr, and ms results are given for the new compounds.

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