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Molbank, Volume 2010, Issue 1 (March 2010) – 22 articles

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104 KiB  
Short Note
2-{5-(1,3-Benzodioxol-5-yl)-1-[4-(4-chlorophenyl)-1,3-thiazol-2-yl]-4,5-dihydro-1H-pyrazol-3-yl}pyrazine
by Balapragalathan Thappali Jothikrishnan, Sriram Narasimhan and Suban Syed Shafi
Molbank 2010, 2010(1), M668; https://doi.org/10.3390/M668 - 19 Mar 2010
Viewed by 5365
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. Full article
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125 KiB  
Short Note
5,5'-(1,4-Phenylenedimethylylidene)bis(1,3-diethyl-2-thioxodihydropyrimidine-4,6(1H,5H)-dione)
by Abdullah Mohamed Asiri and Salman A. Khan
Molbank 2010, 2010(1), M667; https://doi.org/10.3390/M667 - 17 Mar 2010
Viewed by 6011
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, 1H-NMR, 13C-NMR and EI-MS spectral analysis. Full article
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51 KiB  
Short Note
5-[(3,5-Dimethyl-1-phenyl-1H-pyrazol-4-yl)methylene]-1,3-diethyl-2-thioxodihydropyrimidine-4,6(1H,5H)-dione
by Abdullah Mohamed Asiri and Salman A. Khan
Molbank 2010, 2010(1), M666; https://doi.org/10.3390/M666 - 17 Mar 2010
Viewed by 6407
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, 1H-NMR, 13C-NMR and EI-MS spectral analysis. Full article
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54 KiB  
Short Note
1-{[(3,4-Dimethylisoxazol-5-yl)imino]methyl}-2-naphthol
by Abdullah Mohamed Asiri and Salman A. Khan
Molbank 2010, 2010(1), M665; https://doi.org/10.3390/M665 - 16 Mar 2010
Viewed by 6105
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, 1H-NMR, 13C-NMR and EI-MS spectral analysis. Full article
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62 KiB  
Short Note
1,3,5-Tris-(2,3-dihydro-1H-1,5-benzodiazepin-4-yl)-1,2,3,4,5,6-hexahydro-s-triazine
by Braulio Insuasty, Angelica Garcia, Rodrigo Abonia, Manuel Nogueras and Justo Cobo
Molbank 2010, 2010(1), M664; https://doi.org/10.3390/M664 - 16 Mar 2010
Cited by 1 | Viewed by 5785
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, 1H-NMR, 13C-NMR and MS) data are supplied to support the proposed structure for the title compound. Full article
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86 KiB  
Short Note
Luminescent Lariat Aza-Crown Ether Carboxylic Acid
by Andreas Späth, Eva-Maria Rummel and Burkhard König
Molbank 2010, 2010(1), M663; https://doi.org/10.3390/M663 - 12 Mar 2010
Cited by 1 | Viewed by 7521
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. Full article
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147 KiB  
Short Note
Luminescent Lariat Aza-Crown Ether
by Andreas Späth, Eva-Maria Rummel and Burkhard König
Molbank 2010, 2010(1), M662; https://doi.org/10.3390/M662 - 10 Mar 2010
Viewed by 6475
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. Full article
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97 KiB  
Short Note
(2-Chlorophenyl)-3-methylchromeno[2,3-c]pyrazol-4(1H)-one
by Giselle Batezila and Wolfgang Holzer
Molbank 2010, 2010(1), M661; https://doi.org/10.3390/M661 - 9 Mar 2010
Cited by 2 | Viewed by 5781
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 (1H NMR, 13C NMR, 15N [...] Read more.
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 (1H NMR, 13C NMR, 15N NMR, IR, MS) are presented. Full article
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83 KiB  
Short Note
Aza-27-crown-9 Amino Acid
by Andreas Späth and Burkhard König
Molbank 2010, 2010(1), M660; https://doi.org/10.3390/M660 - 4 Mar 2010
Cited by 2 | Viewed by 6046
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. Full article
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77 KiB  
Short Note
N-[1-(2,5-Dimethyl-3-thienyl)ethylidene]-1,3-benzothiazol-2-amine
by Abdullah Mohamed Asiri and Salman A. Khan
Molbank 2010, 2010(1), M659; https://doi.org/10.3390/M659 - 3 Mar 2010
Viewed by 6135
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, 1H-NMR, 13C-NMR and EI-MS spectral analysis. Full article
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121 KiB  
Short Note
(Benzoylamino)methyl 4-Hydroxybenzoate
by Emil Popovski and Kristina Mladenovska
Molbank 2010, 2010(1), M658; https://doi.org/10.3390/M658 - 25 Feb 2010
Cited by 3 | Viewed by 5981
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. Full article
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Scheme 1

63 KiB  
Short Note
5-Methyl-4-oxo-4,6-dihydro-3H-pyridazino[4,5-b]carbazole-1-carbonitrile
by Miriam Emich and Norbert Haider
Molbank 2010, 2010(1), M657; https://doi.org/10.3390/M657 - 3 Feb 2010
Viewed by 5015
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. Full article
69 KiB  
Short Note
Manganese 5,10,15,20-Tetra(N-ethyl-3-carbazolyl) Porphyrin
by Cynthia Pruitt Tidwell, L. Dalila Fondren and David E. Nikles
Molbank 2010, 2010(1), M656; https://doi.org/10.3390/M656 - 29 Jan 2010
Cited by 1 | Viewed by 5597
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 [...] Read more.
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-1M-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. Full article
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231 KiB  
Short Note
Ethyl 2-[(Z)-2-(4-Cyanophenyl)-2-hydroxyvinyl]-4-(4-methoxyphenyl)-6-methyl-1,4-dihydropyrimidine-5-carboxylate
by Sukhdeep Singh, Andreas Schober and Gregor Alexander Groß
Molbank 2010, 2010(1), M655; https://doi.org/10.3390/M655 - 29 Jan 2010
Cited by 2 | Viewed by 5525
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 Full article
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Scheme 1

152 KiB  
Short Note
1-[4-[Bis(2-chloroethyl)amino]benzyl]-5,5-dimethyl-2,5-dihydro-4H-benzo[e]isoindol-4-one (Cytotoxic Oxonaphthalene-pyrroles, Part II)
by Helmut Spreitzer and Christiane Puschmann
Molbank 2010, 2010(1), M654; https://doi.org/10.3390/M654 - 29 Jan 2010
Cited by 3 | Viewed by 4962
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. Full article
98 KiB  
Short Note
4,6-Diamino-5-(4-methylbenzylidene)pyrimidin-2(5H)-one
by Gricela Lobo, Jaime Charris, Margaret Valderrama, Jesús Romero, Cristina Castelli and Antonieta Taddei
Molbank 2010, 2010(1), M653; https://doi.org/10.3390/M653 - 27 Jan 2010
Cited by 2 | Viewed by 5624
Abstract
A new compound, 4,6-diamino-5-(methylbenzylidene)pyrimidin-2(5H)-one, was synthesized and its IR, 1H NMR,13C NMR and MS spectroscopic data are presented. Full article
68 KiB  
Short Note
6-Oxo-3-phenyl-5,6-dihydropyridazine-1(4H)-carbohydrazide
by Ravinesh Mishra, Anees Ahmad Siddiqui, Rajiv Kumar and Suresh Kumar
Molbank 2010, 2010(1), M652; https://doi.org/10.3390/M652 - 26 Jan 2010
Cited by 3 | Viewed by 5715
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, 1H-NMR, 13C-NMR and mass spectral data. Full article
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77 KiB  
Short Note
2-[4-[Bis(2-chloroethyl)amino]benzyl]-5,5-dimethyl-2,5-dihydro-4H-benzo[e]isoindol-4-one (Cytotoxic Oxonaphthalene-Pyrroles, Part I)
by Helmut Spreitzer and Christiane Puschmann
Molbank 2010, 2010(1), M651; https://doi.org/10.3390/M651 - 22 Jan 2010
Cited by 3 | Viewed by 4828
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. Full article
109 KiB  
Short Note
5-(3-Nitrophenyl)-3-phenyl-4,5-dihydro-1H-pyrazole-1-carbaldehyde
by Pramod Singh, Jagmohan S. Negi, Geeta Joshi nee Pant and Mohan S.M. Rawat
Molbank 2010, 2010(1), M650; https://doi.org/10.3390/M650 - 22 Jan 2010
Cited by 1 | Viewed by 6070
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. Full article
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Scheme 1

182 KiB  
Short Note
2-(4-Pyridyl)-1,3-di(4-picolyl)imidazolidine
by Beyhan Yiğit, Murat Yiğit, İsmail Özdemir, Bekir Çetinkaya and Engin Çetinkaya
Molbank 2010, 2010(1), M649; https://doi.org/10.3390/M649 - 22 Jan 2010
Viewed by 5795
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, 1H NMR and 13C NMR. Full article
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Scheme 1

155 KiB  
Short Note
3-Methyl-4,5,6,7-tetrahydro-1-benzothiophene-2-carboxylic Acid
by Sembian Ruso Jayaraman, Madhavan Sridharan and Rajendiran Nagappan
Molbank 2010, 2010(1), M648; https://doi.org/10.3390/M648 - 6 Jan 2010
Cited by 1 | Viewed by 5557
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 Et3SiH/I2 as a reducing agent. The title compound was characterized by IR, 1H NMR, 13C NMR and LCMS. Full article
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Scheme 1

57 KiB  
Short Note
1-(6-Ethoxy-6-oxohexyl)-4-methylquinolinium Iodide
by Angela Winstead and Stanley Oyaghire
Molbank 2010, 2010(1), M647; https://doi.org/10.3390/M647 - 25 Dec 2009
Viewed by 5380
Abstract
The N-ethoxycarbonylhexyl quaternary salt of lepidine has been synthesized in one step in 56% yield. 1H and 13C NMR data are reported. Full article
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Scheme 1

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