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M647
Received: 17 December 2009 / Accepted: 22 December 2009 / Published: 25 December 2009
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| Download PDF Full-text (57 KB) | Abstract: The N -ethoxycarbonylhexyl quaternary salt of lepidine has been synthesized in one step in 56% yield. 1 H and 13 C NMR data are reported.
M648
Received: 1 December 2009 / Accepted: 24 December 2009 / Published: 6 January 2010
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| Download PDF Full-text (155 KB) | Abstract: 3-Methyl-4,5,6,7-tetrahydro-1-benzothiophene-2-carboxylic acid was synthesized chemoselectively from 3-formyl-4,5,6,7-tetrahydro-1-benzothiophene-2-carboxylic acid, using Et3 SiH/I2 as a reducing agent. The title compound was characterized by IR, 1 H NMR, 13 C NMR and LCMS.
M649
Received: 5 January 2010 / Accepted: 13 January 2010 / Published: 22 January 2010
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| Download PDF Full-text (182 KB) | Abstract: The title compound was prepared by treatment of N,N ’-di(4-picolyl¬amino)ethane with N,N -dimethylformamide dimethylacetal in toluene and it was characterized by elemental analysis, 1 H NMR and 13 C NMR.
M650
Received: 11 December 2009 / Accepted: 15 January 2010 / Published: 22 January 2010
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| Download PDF Full-text (109 KB) | Abstract: A novel 1-formyl-2-pyrazoline was synthesized by reaction of an α,β- unsaturated ketone with hydrazine hydrate and formic acid. The structure of the title compound was established by UV, IR, 1H NMR, 13C NMR and microanalysis.
M651
Received: 4 December 2009 / Accepted: 12 January 2010 / Published: 22 January 2010
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| Download PDF Full-text (77 KB) | Abstract: A bis(chloroethyl)amine containing side chain is attached to an oxonaphthalene-annelated pyrrol in expectation of DNA alkylating properties. The cytotoxicity is evaluated against two cell lines, KB-31 and KB-8511, respectively.
M652
Received: 17 November 2009 / Accepted: 22 December 2009 / Published: 26 January 2010
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| Download PDF Full-text (68 KB) | Abstract: We report herein the synthesis of 6-oxo-3-phenyl-5,6-dihydropyridazine-1(4H )-carbohydrazide from β-benzoylpropionic acid and carbohydrazide by refluxing in absolute ethanol in presence of sodium acetate. The structure of the newly synthesized compound was established on the basis of IR, 1 H-NMR, 13 C-NMR and mass spectral data.
M653
Received: 26 November 2009 / Accepted: 11 December 2009 / Published: 27 January 2010
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| Download PDF Full-text (98 KB) | Abstract: A new compound, 4,6-diamino-5-(methylbenzylidene)pyrimidin-2(5H )-one, was synthesized and its IR, 1 H NMR,13 C NMR and MS spectroscopic data are presented.
M654
Received: 4 December 2009 / Accepted: 26 January 2010 / Published: 29 January 2010
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| Download PDF Full-text (152 KB) | Abstract: A bis(chloroethyl)amine-containing side chain is attached to an oxonaphthalene-annelated pyrrole in expectation of DNA alkylating properties. The cytotoxicity is evaluated against two cell lines, KB-31 and KB-8511, respectively.
M655
Received: 22 December 2009 / Accepted: 19 January 2010 / Published: 29 January 2010
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| Download PDF Full-text (231 KB) | Abstract: A one-pot, two-step method has been developed for the synthesis of ethyl 2-[(Z )-2-(4-cyanophenyl)-2-hydroxyvinyl]-4-(4-methoxyphenyl)-6-methyl-1,4-dihydropyrimidine-5-carboxylate, including a sulfide contraction step utilizing solution and solid phase synthesis
M656
Received: 18 December 2009 / Accepted: 22 January 2010 / Published: 29 January 2010
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| Download PDF Full-text (69 KB) | Abstract: Manganese complex of 5,10,15,20-tetra(N -ethyl-3-carbazolyl) porphyrin was synthesized and characterized by electronic absorption spectrophotometry and cyclic voltammetry. The spectral data were in agreement with the proposed structure. The manganese complex exhibited a shift in the Soret band in comparison to the non-metallated porphyrin and the extinction coefficient for the Soret band was on the order of 105 cm-1 M-1 . Trends observed in the oxidation and reduction potentials were consistent with the nature of the porphyrin. That is, the electron donating group in 5,10,15,20-tetra(N -ethyl-3-carbazolyl) porphyrin enhances oxidation and inhibits reduction.
M657
Received: 15 January 2010 / Accepted: 1 February 2010 / Published: 3 February 2010
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| Download PDF Full-text (63 KB) | Abstract: The title compound was prepared in excellent yield from 5-methyl-4-oxo-4,6-dihydro-3H -pyridazino[4,5-b ]carbazole-1-carbaldehyde by treatment with hydroxylamine hydrochloride in formic acid without isolation of the intermediate oxime.
M658
Received: 14 January 2010 / Accepted: 22 February 2010 / Published: 25 February 2010
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| Download PDF Full-text (121 KB) | Abstract: (Benzoylamino)methyl 4-hydroxybenzoate (“Benzamidomethylparaben”) (3 ) was obtained from a reaction of 4-hydroxybenzoic acid (2 ) with a dioxane suspension of (benzamidomethyl)triethylammonium chloride (1 ). The phenolic group in 2 cannot be benzamidomethylated with 1 in aqueous media.
M659
Received: 10 January 2010 / Accepted: 22 February 2010 / Published: 3 March 2010
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| Download PDF Full-text (77 KB) | Abstract: The title compound, N -[1-(2,5-dimethyl-3-thienyl)ethylidene]-1,3-benzothiazol-2-amine has been synthesized by condensation of 2-aminobenzothiazole and 3-acetyl-2,5-dimethylthiophene in ethanol. The structure of this new compound was confirmed by elemental analysis, IR, 1 H-NMR, 13 C-NMR and EI-MS spectral analysis.
M660
Received: 24 February 2010 / Accepted: 3 March 2010 / Published: 4 March 2010
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| Download PDF Full-text (83 KB) | Abstract: A luminescent aza-27-crown-9 ether amino acid was prepared by a three-step reaction sequence. The compound signals ammonium ion binding by an increase in emission intensity.
M661
Received: 9 February 2010 / Accepted: 8 March 2010 / Published: 9 March 2010
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| Download PDF Full-text (97 KB) | Abstract: The title compound was prepared by treatment of 1-(2-chlorophenyl)-3-methyl-2-pyrazolin-5-one with 2-chlorobenzoyl chloride / Ca(OH)2 in 1,4-dioxane and subsequent cyclization of the thus obtained 4-aroyl-5-hydroxypyrazole with sodium hydride in dry DMF. Detailed spectroscopic data (1 H NMR, 13 C NMR, 15 N NMR, IR, MS) are presented.
M662
Received: 24 February 2010 / Accepted: 9 March 2010 / Published: 10 March 2010
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| Download PDF Full-text (147 KB) | Abstract: Lariat ethers are interesting recognition motifs in supramolecular chemistry. The synthesis of a luminescent lariat ether with triglycol chain by azide–alkyne (Huisgen) cycloaddition is presented.
M663
Received: 24 February 2009 / Accepted: 11 March 2010 / Published: 12 March 2010
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| Download PDF Full-text (86 KB) | Abstract: Lariat ethers are interesting recognition motifs in supramolecular chemistry. The synthesis of a luminescent lariat aza-crown ether with a carboxyl group appended by azide-alkyne (Huisgen) cycloaddition is presented.
M664
Received: 18 September 2009 / Accepted: 8 October 2009 / Published: 16 March 2010
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| Download PDF Full-text (62 KB) | Abstract: A new compound, 1,3,5-tris-(2,3-dihydro-1H -1,5-benzodiazepin-4-yl)-1,2,3,4,5,6-hexahydro-s -triazine was obtained by the reaction of ortho -phenylenediamine 1 with 1,3,5-triacryl-1,2,3,4,5,6-hexahydro-1,3,5-triazine 2 . Spectroscopic (IR, 1 H-NMR, 13 C-NMR and MS) data are supplied to support the proposed structure for the title compound.
M665
Received: 1 February 2010 / Accepted: 12 March 2010 / Published: 16 March 2010
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| Download PDF Full-text (54 KB) | Abstract: The title compound, 1-{[(3,4-dimethylisoxazol-5-yl)imino]methyl}-2-naphthol has been synthesized by condensation of 5-amino-3,4-dimethylisoxazole and 2-hydroxy-1-naphthaledhyde in ethanol. The structure of this new compound was confirmed by elemental analysis, IR, 1 H-NMR, 13 C-NMR and EI-MS spectral analysis.
M666
Received: 1 March 2010 / Accepted: 16 March 2010 / Published: 17 March 2010
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| Download PDF Full-text (51 KB) | Abstract: The title compound, 5-[(3,5-dimethyl-1-phenyl-1H -pyrazol-4-yl)methylene]-1,3-diethyl-2-thioxodihydropyrimidine-4,6(1H ,5H )-dione, has been synthesized by condensation of 1,3-diethyl-2-thiobarbituric acid and 3,5-dimethyl-1-phenylpyrazole-4-carbaldehyde in ethanol in the presence of pyridine. The structure of this new compound was confirmed by elemental analysis, IR, 1 H-NMR, 13 C-NMR and EI-MS spectral analysis.
M667
Received: 1 March 2010 / Accepted: 16 March 2010 / Published: 17 March 2010
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| Download PDF Full-text (125 KB) | Abstract: A novel compound, 5,5'-(1,4-phenylenedimethylylidene)bis(1,3-diethyl-2-thioxodihydropyrimidine-4,6(1H ,5H )-dione) (3 ) has been synthesized by condensation of 1,3-diethyl-2-thiobarbituric acid and terephthalaldehyde in anhydrous ethanol in the presence of pyridine. The structure of this compound was established by elemental analysis, IR, 1 H-NMR, 13 C-NMR and EI-MS spectral analysis.
M668
Received: 9 March 2010 / Accepted: 17 March 2010 / Published: 19 March 2010
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| Download PDF Full-text (104 KB) | Abstract: A simple method for the synthesis of a pyrazolyl thiazole derivative containing a piperonal moiety was developed. Thus, 2-{5-(1,3-benzodioxol-5-yl)-1-[4-(4-chlorophenyl)-1,3-thiazol-2-yl]-4,5-dihydro-1H -pyrazol-3-yl}pyrazine was synthesized using microwave irradiation and characterized by NMR, IR and LCMS data.
Displaying article 1-22
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