Papers by Ali Zayed Al-Rubaie
Synthesis and characterization of some new organotellurium compounds containing an ortho-acetamido group
Polyhedron, Aug 1, 1995
A wide range of organotellurium compounds containing an acetamido group in the position ortho to ... more A wide range of organotellurium compounds containing an acetamido group in the position ortho to the tellurium atom have been prepared and characterized according to their elemental analyses, IR, 1H NMR and mass spectral data.
Synthesis, characterization, and computational study of some new organotellurium compounds containing azomethine groups
Heteroatom Chemistry, 2008
ABSTRACT The reaction of ortho-mercurated anilines with benzaldehyde gave the ortho-mercurated Sc... more ABSTRACT The reaction of ortho-mercurated anilines with benzaldehyde gave the ortho-mercurated Schiff bases. The reaction of the mercurated Schiff bases with tellurium tetrabromide in 1:1 and 2:1 mole ratio using dry chloroform as solvent gave the ortho-tellurated Schiff bases compounds ArTeBr3 and Ar2TeBr2, respectively, in good yields (where Ar = 5-ClC6H3N=CHC6H5, 5-BrC6H3N=CHC6H5, 5-CH3OC6H3N=CHC6H5, and 5-NO2C6H3N=CHC6H5). The reduction of ArTeBr3 by hydrazine hydrate gave the corresponding ditelluride (i.e., Ar2Te2). Treatment of Ar2TeBr2 with hydrazine hydrate afforded tellurides (Ar2Te) in good yields. Attempts to prepare the corresponding aryl tellurenyl bromides, ArTeBr, by partial reduction of ArTeBr3 with various reducing agents were unsuccessful. All these new compounds were characterized by microanalysis, 1H, and 13C NMR, IR, and mass spectroscopic data. A computational study for the Te → N interactions of all compounds was calculated using the GAUSSIAN 03 program package. © 2008 Wiley Periodicals, Inc. Heteroatom Chem 19:307–315, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/hc.20437
Synthesis and characterization of new organotellurium compounds containing an ortho-amino group
Journal of Organometallic Chemistry, 1993
Abstract A range of novel organotellurium compounds with an amino group ortho to the tellurium at... more Abstract A range of novel organotellurium compounds with an amino group ortho to the tellurium atom (i.e. ArTeBr3 and Ar2Te, where Ar = 2-NH2-5-RC6H3; R = CH3, Br, NO2) have been prepared by a convenient new route involving reaction of the corresponding 2-aminoarylmercury chloride with tellurium tetrabromide. Reduction of ArTeBr3 gave the compounds Ar2Te2 in good yield; these were treated with chlorine to give ArTeCl3 in quantitive yield.
ChemInform, Aug 22, 2010
ChemInform Abstract The title complex (III) is prepared by 1:2 molar reaction of the tributylphos... more ChemInform Abstract The title complex (III) is prepared by 1:2 molar reaction of the tributylphosphine analogue (I) with the diphosphine (II). Its characterization occurs by IR and VIS spectroscopy, and by an X-ray structure analysis (space group C2/c, Z=4).
Synthesis, characterization and antibacterial studies of some new tellurated azo compounds
Phosphorus Sulfur and Silicon and The Related Elements, Jan 9, 2019
Abstract A series of tellurated azo compounds [i.e. (4-HOC6H4N=N-Ar)TeBr3 and (4-HOC6H4N=N-Ar)2Te... more Abstract A series of tellurated azo compounds [i.e. (4-HOC6H4N=N-Ar)TeBr3 and (4-HOC6H4N=N-Ar)2TeBr2, where Ar=5-BrC6H3, 5-CH3C6H3 and 5-NO2C6H3] were prepared by the reaction of the corresponding 2-(4-hydroxyphenylazo)aryl mercury chloride with tellurium tetrabromide in 1:1 and 2:1 mole ratio, respectively in dry dioxane as a solvent. The reduction of (4-HOC6H4N=N-Ar)TeBr3 by hydrazine hydrate gave the corresponding ditelluride (i.e., (4-HOC6H4N=N-Ar)2Te2). Treatment of (4-HOC6H4N=N-Ar)2TeBr2 with hydrazine hydrate afforded the corresponding tellurides, (4-HOC6H4N=N-Ar)2Te), in good yields. The structures of all newly synthesized compounds were assigned on the basis of their elemental and spectroscopic data. The antibacterial activity of tellurated azo compounds along with mercurated azo compounds was tested with agar diffusion method against the bacteria strains Staphylococcus aureus and Escherichia coli. The antibacterial activities of tellurated azo compounds were in some cases equal or better than those of the reference drug. The mercurated azo compounds were found to be the more antibacterial activity of than those of tellurated azo compounds. Graphical Abstract
Synthesis and spectroscopic investigations of 1-organo-1-halo-1-telluracyclopentane
Journal of Organometallic Chemistry, Jun 1, 1985
Abstract A new class of cyclic telluronium salts has been prepared. All the salts are stable in s... more Abstract A new class of cyclic telluronium salts has been prepared. All the salts are stable in solution in CHCl 3 or dimethylsulphoxide (DMSO). Conductivity measurements in DMSO and dimethylformamide (DMF) have shown that considerable ion pairing occurs in solution. Infrared, 1 H, 13 C, 125 Te NMR, and mass spectra are reported and discussed.
Journal of Organometallic Chemistry, Aug 1, 1982
ChemInform Abstract: THE SYNTHESIS AND SPECTROSCOPIC EXAMINATION OF TELLURONIUM SALTS BASED ON THE 1-ORGANO-3,4-BENZO-1-TELLURACYCLOPENTANE CATION
Chemischer Informationsdienst, Jan 4, 1983
Synthesis, characterization, and solution properties of some new organotellurium compounds based on di(cyclohexylmethyl)telluride
Heteroatom Chemistry, 2007
ABSTRACT A new series of organotellurium(IV) compounds based on di(cyclohexylmethyl)telluride (1)... more ABSTRACT A new series of organotellurium(IV) compounds based on di(cyclohexylmethyl)telluride (1) (i.e., (C6H11CH2)2TeX2 and (C6H11CH2)2Te(R)X) was prepared by the reaction of compound 1 with halogens, N-bromosuccinimide, and alkyl halides. Phenylation of (C6H11CH2)2TeX2 with sodium tetraphenylborate gave di(cyclohexylmethyl)phenyltelluronium tetraphenylborate in good yield. Conductivity measurements in dimethylsulfoxide (DMSO) showed a considerable ionic character of these compounds and they behave as 1:1 electrolytes. 1H NMR studies in CDCl3 solution indicated that telluronium salts employed in this study are unstable toward reductive elimination. Reaction of di(cyclohexylmethyl)telluride, (C6H11CH2)2Te(CH3)I, and (C6H11CH2)2Te(PhCH2)Br with HgX2 (X = Cl or Br) afforded 1:1 complexes. All compounds were characterized by elemental analyses and spectroscopic data. © 2007 Wiley Periodicals, Inc. Heteroatom Chem 18:93–99, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/hc.20240
Synthesis, characterization and antibacterial activity of some new ferrocenyl selenazoles and 3,5-diferrocenyl-1,2,4-selenadiazole
Journal of Organometallic Chemistry, Dec 1, 2014
ABSTRACT New ferrocenyl containing selenazole derivatives were synthesized from reactions of aryl... more ABSTRACT New ferrocenyl containing selenazole derivatives were synthesized from reactions of aryl selenocarboxamide (i.e. Ar-C=Se(NH2); Ar=C6H5 (1), 4-Br-C6H4 (2), 4-PhC6H4 (3), 4-CH3OC6H4 (4), 4-CH3SC6H4 (5), 6-MeO-naphyl (6), 4-MeO-naphthyl (7), 4-C2H5OC6H4 (8), 3,4-(CH3O)(2)C6H3 (9), and 3,5-(CH3O)(2)C6H3 (10)) with (2-bromoacetyl) ferrocene. The structures of the new compounds were determined by elemental analyses, IR, H-1 and C-13 NMR and mass spectroscopic data. Reaction of 1-cyanoferrocene with sodium hydrogen selenide (NaHSe) in methanol gave the new ferrocenyl selenocarboxamide (11) in 27% yield. Treatment of compound 11 with a catalytic amount of Na-2[PdCl4] gave 3,5-diferrocenyl-1,2,4-selenadiazole in 35% yield. Both compounds were characterized elemental analyses and spectroscopic techniques. Compounds 1-10 and 12 were screened as antibacterial agents against Staphylococcus aureus, Escherichia coli and Pseudomonas aeruginosa and showed promising properties.
Synthesis of hexenyl aryl tellurides and the catalytic activity of their platinum(II) complexes as polysiloxanesupported catalysts in hydrosilylation of olefins
IOP Conference Series: Materials Science and Engineering, 2020
5-hexenyl 1-naphthyl telluride (1) and 5-hexenyl (1,1’-binaphthyl-2-yl) telluride (2) were prepar... more 5-hexenyl 1-naphthyl telluride (1) and 5-hexenyl (1,1’-binaphthyl-2-yl) telluride (2) were prepared from the reaction of 1-bromonaphthalene and 2-bromobinaphthalene with di(5-hexenyl) ditelluride in presence of lithium metal. Reaction of 1 and 2 with K2PtCl4 afforded the platinum(II) complexes 3 and 4, respectively in good yields. Silica-bound telluride-platinum complexes were directly synthesized from fumed silica, triethoxysilane and platinum complexes (i.e. 3 and 4). The catalytic activities of polysiloxane-supported platinum complexes were examined with 1-hexene, 1-decene and 1-dodecene at different temperature. It was found that these catalysts are efficient for hydrosilylation of olefins with triethoxysilane.
합성, 2, 4-Diaryl-1, 3-selenazoles 의 항바이러스 활성도와 반응
Journal of the …, 2008
ABSTRACT. The cyclization of primary arylselenocarboxylic amides with α-bromoketones afforded a v... more ABSTRACT. The cyclization of primary arylselenocarboxylic amides with α-bromoketones afforded a variety of new 2, 4-diaryl-1, 3-selenazoles. Halogenation of the 2, 4-diaryl-1, 3-selenazoles with chlorine, bromine and iodine gave the new 1, 1-dihalo-2, 4-diaryl-1, 3-...
ChemInform Abstract: Synthesis and Characterization of New Organotellurium Compounds Containing an ortho-Amino Group
ChemInform, Aug 20, 2010
ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was e... more ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
Synthesis, characterization and antibacterial studies of some new tellurated azo compounds
A series of tellurated azo compounds [<i>i.e</i>. (4-HOC<sub>6</sub>H<... more A series of tellurated azo compounds [<i>i.e</i>. (4-HOC<sub>6</sub>H<sub>4</sub>N=N-Ar)TeBr<sub>3</sub> and (4-HOC<sub>6</sub>H<sub>4</sub>N=N-Ar)<sub>2</sub>TeBr<sub>2</sub>, where Ar=5-BrC<sub>6</sub>H<sub>3</sub>, 5-CH<sub>3</sub>C<sub>6</sub>H<sub>3</sub> and 5-NO<sub>2</sub>C<sub>6</sub>H<sub>3</sub>] were prepared by the reaction of the corresponding 2-(4-hydroxyphenylazo)aryl mercury chloride with tellurium tetrabromide in 1:1 and 2:1 mole ratio, respectively in dry dioxane as a solvent. The reduction of (4-HOC<sub>6</sub>H<sub>4</sub>N=N-Ar)TeBr<sub>3</sub> by hydrazine hydrate gave the corresponding ditelluride (<i>i.e</i>., (4-HOC<sub>6</sub>H<sub>4</sub>N=N-Ar)<sub>2</sub>Te<sub>2</sub>)....
IOP Conference Series: Materials Science and Engineering, 2020
2-Acetylamino-2’-tellurocyanato-1,1’-binaphthyl (1) was prepared from the reaction of potassium t... more 2-Acetylamino-2’-tellurocyanato-1,1’-binaphthyl (1) was prepared from the reaction of potassium tellurocyanate with 2-acetylamino-[1,1’- binaphthalene]-2’-diazonium chloride. Treatment of 1 with hydrochloric acid gave bis(2-amino-1,1’-binaphthalene-2’-yl) ditelluride (2) in 65% yield. Reaction of 2 with phenylacetyl chloride and trimethylacetyl chloride gave bis(2-phenylacetylamino-1,1’-binaphthalene-2’-yl) ditelluride (3) and bis(2-trimethyl-acetylamino-1,1’-binaphthalene-2’-yl) ditelluride (4), respectively. (2-Acetylamino-1,1’-binaphthyl-2’-yl)tellurium tribromide (5) was prepared by reaction of 1 with bromine. Partial reduction of 5 gave the corresponding tellurenyl bromide (6) which in turn reacted with KCN to afford compound 1 in good yield. Alkaline hydrolysis of 1 or reduction of 5 and 6 with hydrazine hydrate in boiling ethanol gave bis (2-acetylamino-1,1’-binaphthalene-2’-yl) ditelluride (7) in good yield. All these new compounds were characterized by elemental analyses, I...
Journal of Physics: Conference Series, 2021
Diaryl Chalcogenides (i.e. Ar2E where Ar = 4-CH3C6H4, 4-BrC6H4, E= S, Se and Te) were reacted wit... more Diaryl Chalcogenides (i.e. Ar2E where Ar = 4-CH3C6H4, 4-BrC6H4, E= S, Se and Te) were reacted with [RhCl(CO)2]2 and rhodium(III) chloride trihydrate to give compounds of type [RhCl(CO)2(Ar2E)] and [RhCl3(Ar2E)3], respectively. All compounds were characterized by IR, NMR, and mass spectroscopic data. Attempts to prepare hydroxyapatite (HAp) supported rhodium catalyst by using different methods were unsuccessful. Complexes [RhCl(CO)2((4-R-C6H4)2S)], [RhCl(CO)2((4-R-C6H4)2Se)] and [RhCl(CO)2((4-R-C6H4)2Te), where R= CH3 or Br], were evaluated as catalysts for hydrosilylation of allyl phenyl ether and 1-decene. They showed good catalytic activities for hydrosilylation of alkenes with triethoxysilane.
Journal of Physics: Conference Series, 2021
Ten chalcogen and mercury bearing compounds based on 4-aminobenzoic acid (i.e., (2-amino-5-(ethox... more Ten chalcogen and mercury bearing compounds based on 4-aminobenzoic acid (i.e., (2-amino-5-(ethoxycarbonyl)phenyl)mercury(II) chloride (1), (2-amino-5-(ethoxycarbonyl)phenyl) phenyl selenide (2), (2-amino-5-(ethoxycarbonyl)phenyl) phenyl telluride (3), (4-carboxyphenyl)mercury(II) chloride (4), 4-selenocyanatobenzoic acid (5), 4-tellurocyanatobenzoic acid (6), bis(4-carboxyphenyl) diselenide (7) bis(4-carboxyphenyl) ditelluride (8), bis(4-carboxyphenyl) selenide (9) bis(4-carboxyphenyl) telluride (10) were prepared and characterized by various spectroscopic techniques. All compounds were screened for antibacterial activity against Gram-positive bacterial strains of Staphylococcus aureus and the Gram-negative bacteria Escherichia coli by using the disk diffusion technique. The antibacterial activity of these compounds was dependent on the molecular structure of the compounds, and the bacterial strain under consideration.
ChemInform Abstract: Thermal Behavior of Some New Organotellurium Compounds Containing an ortho-Acetamido Group
ChemInform, 2010
The 2-phenylsulphonamide derivatives of amino acids were synthesis by simple substitution of benz... more The 2-phenylsulphonamide derivatives of amino acids were synthesis by simple substitution of benzenesulphonylchloride (6) with amino acids (1-5) containing pharmacological active functionalities. Structures of the synthesised compounds (7a-7e) were characterised using FT-IR, NMR (1 H, 13 C) and elemental analysis. The anti bacterial activities of the synthesised compounds were evaluated against gram positive bacteria: Staph and Streptococcus, gram negative bacteria: E-coli, Klebsiella, Proteus, and pseudomonas using 200 µl of 10 mg/ml and minimum inhibitory concentration (MIC) were also determined. The compounds exhibited effective anti bacterial properties though some are not more active than the standard drug ciprofloxacin.
The 2-phenylsulphonamide derivatives of amino acids were synthesis by simple substitution of benz... more The 2-phenylsulphonamide derivatives of amino acids were synthesis by simple substitution of benzenesulphonylchloride (6) with amino acids (1-5) containing pharmacological active functionalities. Structures of the synthesised compounds (7a-7e) were characterised using FT-IR, NMR (1 H, 13 C) and elemental analysis. The anti bacterial activities of the synthesised compounds were evaluated against gram positive bacteria: Staph and Streptococcus, gram negative bacteria: E-coli, Klebsiella, Proteus, and pseudomonas using 200 µl of 10 mg/ml and minimum inhibitory concentration (MIC) were also determined. The compounds exhibited effective anti bacterial properties though some are not more active than the standard drug ciprofloxacin.
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Papers by Ali Zayed Al-Rubaie