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Molbank, Volume 2009, Issue 4 (December 2009)

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Open AccessShort Note 5-Methyl-4-oxo-4,6-dihydro-3H-pyridazino[4,5-b]carbazole-1-carbaldehyde
Molbank 2009, 2009(4), M623; doi:10.3390/M623
Received: 2 October 2009 / Accepted: 5 October 2009 / Published: 5 October 2009
PDF Full-text (181 KB) | Supplementary Files
Abstract The title compound was prepared in good yield by oxidation of 1-(hydroxymethyl)-3,6-dihydro-4H-pyridazino[4,5-b]carbazol-4-one with 2-iodoxybenzoic acid (IBX) in DMSO solution under very mild conditions. Full article
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Open AccessShort Note 1,3,5-Tris{[N-(1,3-diphenyl-1H-pyrazol-4-yl)methylene]-4-aminophenyl}benzene
Molbank 2009, 2009(4), M624; doi:10.3390/M624
Received: 4 August 2009 / Accepted: 10 September 2009 / Published: 7 October 2009
PDF Full-text (79 KB) | Supplementary Files
Abstract 1,3,5-Tris{[N-(1,3-diphenyl-1H-pyrazol-4-yl)methylene]-4-aminophenyl}-benzene was synthesised from N-(4-bromophenyl)-N-[(1,3-diphenyl-1H-pyrazol-4-yl)-methylene]amine and 1,3,5-tribromobenzene by an Ullman coupling reaction. The synthesized compound was charecterised by NMR, IR, MS and elemental analysis. Full article
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Open AccessShort Note 3,4,5,6,7,8,9-Heptachlorophenaleno[1,9-bc]pyrazole
Molbank 2009, 2009(4), M625; doi:10.3390/M625
Received: 22 September 2009 / Accepted: 7 October 2009 / Published: 7 October 2009
PDF Full-text (66 KB) | Supplementary Files
Abstract Treatment of perchloro-7H-cyclopropano[a]acenaphthylene 1 with hydrazine hydrate in DMF at ca. 80 °C gives the new 3,4,5,6,7,8,9-heptachlorophenaleno[1,9-bc]pyrazole 2 in 69% yield. This compound is the first example of a phenalene fused pyrazole. Full article
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Open AccessShort Note (S*)-2,7,8-Trihydroxychroman-4-one
Molbank 2009, 2009(4), M626; doi:10.3390/M626
Received: 21 September 2009 / Accepted: 8 October 2009 / Published: 9 October 2009
Cited by 7 | PDF Full-text (219 KB) | Supplementary Files
Abstract Reticumanone (1), a new chromanone, isolated from the leaves of Cinnamomum reticulatum Hay (Lauraceae), has been characterized as (S*)-2,7,8-trihydroxychroman-4-one, by means of spectroscopic methods. Full article
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Open AccessShort Note 3,6-Bis(5’-bromo-3’-indolyl)-1,4-dimethypiperazine-2,5-dione
Molbank 2009, 2009(4), M627; doi:10.3390/M627
Received: 22 September 2009 / Accepted: 7 October 2009 / Published: 9 October 2009
PDF Full-text (43 KB) | Supplementary Files
Abstract The one-pot synthesis of 3,6-bis(5’-bromo-3’-indolyl)-1,4-dimethylpiperazine- 2,5-dione is reported. Sarcosine anhydride is brominated and immediately reacted with 5-bromoindole to produce the product, which is characterized by 1H NMR, MS and microanalysis. Full article
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Open AccessShort Note tert-Butyl 3-(4-Cyano-5-phenylisothiazol-3-yl)carbazate
Molbank 2009, 2009(4), M628; doi:10.3390/M628
Received: 22 September 2009 / Accepted: 10 October 2009 / Published: 12 October 2009
PDF Full-text (131 KB) | Supplementary Files
Abstract 3-Iodo-5-phenylisothiazole-4-carbonitrile 1 reacts with tert-butyl carbazate via a Buchwald C-N style coupling to afford tert-butyl 3-(4-cyano-5-phenylisothiazol-3-yl)- carbazate 2 in 70% yield. [...] Full article
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Open AccessShort Note 4-{[(3-Chlorophenyl)imino]methyl}-3-hydroxyphenyl Myristate
Molbank 2009, 2009(4), M629; doi:10.3390/M629
Received: 7 August 2009 / Accepted: 13 October 2009 / Published: 14 October 2009
PDF Full-text (42 KB) | Supplementary Files
Abstract A new Schiff base ester, 4-{[(3-chlorophenyl)imino]methyl}-3-hydroxyphenyl myristate, was synthesized and its IR, 1H NMR, 13C NMR and MS spectroscopic data are presented. Full article
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Open AccessShort Note 4-{[(3-Cyanophenyl)imino]methyl}-3-hydroxyphenyl Tetradecanoate
Molbank 2009, 2009(4), M630; doi:10.3390/M630
Received: 26 August 2009 / Accepted: 13 October 2009 / Published: 14 October 2009
PDF Full-text (39 KB) | Supplementary Files
Abstract A new Schiff base ester, 4-{[(3-cyanophenyl)imino]methyl}-3-hydroxyphenyl tetradecanoate, was synthesized and its IR, 1H NMR, 13C NMR and MS spectroscopic data are presented. Full article
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Open AccessShort Note 3-Hydroxy-4-{[(3-nitrophenyl)imino]methyl}phenyl Tetradecanoate
Molbank 2009, 2009(4), M631; doi:10.3390/M631
Received: 10 August 2009 / Accepted: 13 October 2009 / Published: 14 October 2009
PDF Full-text (40 KB) | Supplementary Files
Abstract A new Schiff base ester, 3-hydroxy-4-{[(3-nitrophenyl)imino]methyl}phenyl tetradecanoate, was synthesized and its IR, 1H NMR, 13C NMR and MS spectroscopic data are presented. Full article
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Open AccessShort Note 3-Hydroxy-4-[(phenylimino)methyl]phenyl Myristate
Molbank 2009, 2009(4), M632; doi:10.3390/M632
Received: 26 August 2009 / Accepted: 13 October 2009 / Published: 14 October 2009
PDF Full-text (40 KB) | Supplementary Files
Abstract A new Schiff base ester 3-hydroxy-4-[(phenylimino)methyl]phenyl myristate was synthesized and its IR, 1H NMR, 13C NMR and MS spectroscopic data are presented. Full article
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Open AccessShort Note 4-[(1,3-Benzothiazol-2-ylimino)methyl]phenyl Dodecanoate
Molbank 2009, 2009(4), M633; doi:10.3390/M633
Received: 9 October 2009 / Accepted: 14 October 2009 / Published: 14 October 2009
PDF Full-text (124 KB) | Supplementary Files
Abstract A heterocycle, 4-[(1,3-benzothiazol-2-ylimino)methyl]phenyl dodecanoate, was synthesized and its IR, 1H NMR, 13C NMR, elemental analysis and MS spectroscopic data are presented. This new compound exhibited smectic A phase. Full article
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Open AccessShort Note 2-[4-(Hexadecyloxy)-3-methoxyphenyl]-1,3-benzothiazole
Molbank 2009, 2009(4), M634; doi:10.3390/M634
Received: 10 October 2009 / Accepted: 15 October 2009 / Published: 16 October 2009
PDF Full-text (24 KB) | Supplementary Files
Abstract A new heterocycle, 2-[4-(hexadecyloxy)-3-methoxyphenyl]-1,3-benzothiazole, was prepared and its IR, 1H NMR, 13C NMR, elemental analysis and MS spectroscopic data are reported. Full article
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Open AccessShort Note 2,6-Bis(9-ethyl-9H-carbazolylmethylene)cyclohexanone
Molbank 2009, 2009(4), M635; doi:10.3390/M635
Received: 4 September 2009 / Accepted: 27 September 2009 / Published: 26 October 2009
Cited by 2 | PDF Full-text (86 KB) | Supplementary Files
Abstract The title compound, 2,6-bis(ethyl-9-ethyl-9H-carbazolylmethylene)cyclohexanone has been synthesized by condensation of 9-ethylcarbazole-3-aldehyde and cyclohexanone 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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Open AccessShort Note (2E,2'E)-3,3-(1,4-Phenylene)bis[1-(2,5-dimethyl-3-thienyl)prop- 2-en-1-one]
Molbank 2009, 2009(4), M636; doi:10.3390/M636
Received: 27 August 2009 / Accepted: 26 October 2009 / Published: 28 October 2009
PDF Full-text (150 KB) | Supplementary Files
Abstract
A bis-chalcone has been synthesized by reaction of 3-acetyl-,5-dimethylthiophene and terephthalaldehyde in ethanolic NaOH at room temperature: (2E,2'E)-3,3-(1,4-phenylene)bis[1-(2,5-dimethyl-3-thienyl)prop-2-en-1-one] (3) was obtained in high yield. The structure of this compound was established by elemental analysis, IR, 1H NMR, [...] Read more.
A bis-chalcone has been synthesized by reaction of 3-acetyl-,5-dimethylthiophene and terephthalaldehyde in ethanolic NaOH at room temperature: (2E,2'E)-3,3-(1,4-phenylene)bis[1-(2,5-dimethyl-3-thienyl)prop-2-en-1-one] (3) was obtained in high yield. 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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Open AccessShort Note Zinc(II)-5,10,15,20-tetrakis(α-pyridino-m-tolyl)porphyrin Tetrabromide
Molbank 2009, 2009(4), M637; doi:10.3390/M637
Received: 19 October 2009 / Accepted: 3 November 2009 / Published: 4 November 2009
PDF Full-text (132 KB) | Supplementary Files
Abstract Cationic porphyrins interact strongly with guanine quadruplex (G-quadruplex) DNA. We report the preparation of the zinc(II) complex of a porphyrin bearing cationic side arms, zinc(II)-5,10,15,20-tetrakis(α-pyridino-m-tolyl)porphyrin tetrabromide (ZnmPy), as a novel probe for the analysis of G-quadruplex/porphyrin interaction. Full article
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Open AccessShort Note 6-(4-(2-{2-[2-(2-Hydroxy-ethoxy)-ethoxy]-ethoxy}-ethyl)-10-oxa-4-aza-tricyclo[5.2.1.02,6]dec-8-ene-3,5-dione)
Molbank 2009, 2009(4), M638; doi:10.3390/M638
Received: 9 October 2009 / Accepted: 2 November 2009 / Published: 5 November 2009
PDF Full-text (147 KB) | Supplementary Files
Abstract
Microwave irradiation of maleimide with an excess of furan in water exclusively yields the corresponding exo-cycloadduct in good yield (87%) in 1 hour at 90 oC. Alkylation of the imido nitrogen with tetraethylene glycol under Mitsunobu conditions gives the ROMP monomer [...] Read more.
Microwave irradiation of maleimide with an excess of furan in water exclusively yields the corresponding exo-cycloadduct in good yield (87%) in 1 hour at 90 oC. Alkylation of the imido nitrogen with tetraethylene glycol under Mitsunobu conditions gives the ROMP monomer in 81% yield. Full article
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Open AccessShort Note 4-Bromo-3-methoxy-1-phenyl-1H-pyrazole
Molbank 2009, 2009(4), M639; doi:10.3390/M639
Received: 29 October 2009 / Accepted: 4 November 2009 / Published: 5 November 2009
PDF Full-text (124 KB) | Supplementary Files
Abstract The title compound was prepared by treatment of 4-bromo-1-phenyl-1H-pyrazol-3-ol with sodium hydride/methyl iodide in good yield. Detailed spectroscopic data (1H NMR, 13C NMR, 15N NMR, IR, MS) are presented. Full article
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Open AccessShort Note 3-Chloro-4-fluoro-N-{[3-(4-methoxyphenyl)-1-phenyl-1H-pyrazol- 4-yl]methyl}aniline
Molbank 2009, 2009(4), M640; doi:10.3390/M640
Received: 12 October 2009 / Accepted: 29 October 2009 / Published: 5 November 2009
Cited by 1 | PDF Full-text (204 KB) | Supplementary Files
Abstract A direct reductive amination of 3-(4-methoxyphenyl)-1-phenyl-1H-pyrazole-4-carbaldehyde 2 with 3-chloro-4-flouroaniline using NaBH4/I2 as a reducing agent is described. The reaction was carried out in MeOH under neutral conditions at room temperature to give the secondary amine, 3-chloro-4-fluoro-N-{[3-(4-methoxyphenyl)-1-phenyl-1H-pyrazol-4-yl]methyl}aniline (3). Full article
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Open AccessShort Note [1-(4-Chlorophenyl)cyclopropyl](piperazin-1-yl)methanone
Molbank 2009, 2009(4), M641; doi:10.3390/M641
Received: 14 September 2009 / Accepted: 23 October 2009 / Published: 9 November 2009
PDF Full-text (84 KB) | Supplementary Files
Abstract The title compound, [1-(4-chlorophenyl)cyclopropyl](piperazin-1-yl)methanone, was synthesized and characterized by elemental analysis, IR, 1H NMR, 13C NMR and mass spectral data. Full article
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Open AccessShort Note 1,9-Bis(2-pyridyl)-1,2,8,9-tetrathia-5-oxanonane
Molbank 2009, 2009(4), M642; doi:10.3390/M642
Received: 21 October 2009 / Accepted: 16 November 2009 / Published: 17 November 2009
PDF Full-text (144 KB) | Supplementary Files
Abstract
Disulfide crosslinking of proteins is typically performed by treating proteins bearing cysteine residues with small-molecule disulfide reagents. The process results in the formation of a mixed disulfide intermediate, which then reacts with the cysteine residue of another protein molecule to form the [...] Read more.
Disulfide crosslinking of proteins is typically performed by treating proteins bearing cysteine residues with small-molecule disulfide reagents. The process results in the formation of a mixed disulfide intermediate, which then reacts with the cysteine residue of another protein molecule to form the crosslinked product. This second step requires the intimate association of two large reactants. The ensuing steric hindrance can result in poor crosslinking yields. Here, we introduce a bis(disulfide) reagent in which activated disulfides are separated by linkers that can alleviate steric hindrance and thereby potentially increase the efficiency of crosslinking. Full article
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Open AccessShort Note 4,4’-Bis(4-octylphenoxy)-2,2’-bipyridine
Molbank 2009, 2009(4), M643; doi:10.3390/M643
Received: 16 November 2009 / Accepted: 26 November 2009 / Published: 2 December 2009
PDF Full-text (41 KB) | Supplementary Files
Abstract
4,4’-Bis(4-octylphenoxy)-2,2’-bipyridine which can be used in complexes of ruthenium was synthesized. This ligand bears a long chain for the purpose of increasing the solubility of the final complex. The synthesis was achieved through a nucleophilic aromatic substitution reaction of 4,4’-bromo-2,2’-bipyridine and 4-octylphenol. [...] Read more.
4,4’-Bis(4-octylphenoxy)-2,2’-bipyridine which can be used in complexes of ruthenium was synthesized. This ligand bears a long chain for the purpose of increasing the solubility of the final complex. The synthesis was achieved through a nucleophilic aromatic substitution reaction of 4,4’-bromo-2,2’-bipyridine and 4-octylphenol. Full article
Open AccessShort Note (2E)-3-(3-Methoxy-1-phenyl-1H-pyrazol-4-yl)-2-propenal
Molbank 2009, 2009(4), M644; doi:10.3390/M644
Received: 20 November 2009 / Accepted: 3 December 2009 / Published: 4 December 2009
Cited by 2 | PDF Full-text (106 KB) | Supplementary Files
Abstract The palladium-catalyzed reaction of 4-bromo-3-methoxy-1-phenyl-1H-pyrazole with acrolein diethyl acetal gives the title compound in good yield. Detailed spectroscopic data (1H NMR, 13C NMR, 15N NMR, IR, MS) are presented. Full article
Open AccessShort Note Methyl 6-Methyl-4-(4-iodophenyl)-1,2,3,4-tetrahydro-2-thioxo-5-pyrimidinecarboxylate
Molbank 2009, 2009(4), M645; doi:10.3390/M645
Received: 23 October 2009 / Accepted: 11 December 2009 / Published: 15 December 2009
Cited by 1 | PDF Full-text (169 KB) | Supplementary Files
Abstract Methyl 6-methyl-4-(4-iodophenyl)-1,2,3,4-tetrahydro-2-thioxo-5-pyrimidinecarboxylate has been synthesized via Biginelli reaction of 4-iodobenzaldehyde, methyl acetoacetate and thiourea, promoted by microwave irradiation in the presence of iodine under solvent-free conditions in high yield and good purity. Full article
Open AccessShort Note Dimethyl 1,4-Dihydro-2,6-dimethyl-1-(4-methylphenyl)-4-(4-methoxylphenyl)pyridine-3,5-dicarboxylate
Molbank 2009, 2009(4), M646; doi:10.3390/M646
Received: 7 November 2009 / Accepted: 11 December 2009 / Published: 15 December 2009
PDF Full-text (128 KB) | Supplementary Files
Abstract Dimethyl 1,4-dihydro-2,6-dimethyl-1-(4-methylphenyl)-4-(4-methoxylphenyl)–pyridine-3,5-dicarboxylate has been synthesized via Hantzsch condensation reaction of p-methoxybenzaldehyde, methyl acetoacetate and p-toluidine promoted by microwave irradiation (MWI) in the presence of iodine under solvent-free conditions. Full article

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