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Molbank, Volume 2015, Issue 1 (March 2015)

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Editorial

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Open AccessEditorial Acknowledgement to Reviewers of Molbank in 2014
Molbank 2015, 2015(1), M839; doi:10.3390/M839
Received: 8 January 2015 / Accepted: 8 January 2015 / Published: 8 January 2015
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Abstract
The editors of Molbank would like to express their sincere gratitude to the following reviewers for assessing manuscripts in 2014:[...] Full article

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Open AccessShort Note 5,5-Dimethyl-2,2-di(pyridin-2-yl)hexahydropyrimidine
Molbank 2015, 2015(1), M838; doi:10.3390/M838
Received: 24 September 2014 / Accepted: 19 December 2014 / Published: 24 December 2014
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Abstract
Novel 5,5-dimethyl-2,2-di(pyridin-2-yl)hexahydropyrimidine was synthesized in good yield by a one-pot condensation reaction of 2,2-dimethylpropane-1,3-diamine with di(pyridin-2-yl)methanoneusing dichloromethane as solvent at room temperature. The structure of the synthesized compound was assigned on the basis of its elemental analysis, UV-visible, 1H-NMR, 13C-NMR, IR,
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Novel 5,5-dimethyl-2,2-di(pyridin-2-yl)hexahydropyrimidine was synthesized in good yield by a one-pot condensation reaction of 2,2-dimethylpropane-1,3-diamine with di(pyridin-2-yl)methanoneusing dichloromethane as solvent at room temperature. The structure of the synthesized compound was assigned on the basis of its elemental analysis, UV-visible, 1H-NMR, 13C-NMR, IR, and mass spectral data. Full article
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Open AccessShort Note 1,1,2,2,7,7,8,8-Octaethoxyocta-3,5-diyne
Molbank 2015, 2015(1), M840; doi:10.3390/M840
Received: 15 December 2014 / Accepted: 7 January 2015 / Published: 15 January 2015
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Abstract
1,1,2,2,7,7,8,8-Octaethoxyocta-3,5-diyne has been observed as a minor product in several syntheses utilizing 3,3,4,4-tetraethoxybut-1-yne (TEB) as starting material. In order to access this highly functionalized diyne, we have developed a procedure that provides the title compound in excellent yield. Full article
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Open AccessShort Note 2,3,4,9-Tetrahydro-9-(3-hydroxy-1,4-dioxo-1H-dihydro-naphthalen-2-yl)-8-methoxy-3,3-dimethyl-1H-xanthen-1-one
Molbank 2015, 2015(1), M841; doi:10.3390/M841
Received: 16 December 2014 / Revised: 23 January 2015 / Accepted: 27 January 2015 / Published: 30 January 2015
Cited by 3 | PDF Full-text (684 KB) | HTML Full-text | XML Full-text | Supplementary Files
Abstract
The title compound 2,3,4,9-tetrahydro-9-(3-hydroxy-1,4-dioxo-1H-dihydro-naphthalen-2-yl)-8-methoxy-3,3-dimethyl-1H-xanthen-1-one (5) was obtained by the nucleophilic addition of 2-hydroxy-1,4-naphthoquinone (4) to 2H-chromene derivative 3, which was prepared by the domino three-component coupling reaction of aryne precursor 1 with
[...] Read more.
The title compound 2,3,4,9-tetrahydro-9-(3-hydroxy-1,4-dioxo-1H-dihydro-naphthalen-2-yl)-8-methoxy-3,3-dimethyl-1H-xanthen-1-one (5) was obtained by the nucleophilic addition of 2-hydroxy-1,4-naphthoquinone (4) to 2H-chromene derivative 3, which was prepared by the domino three-component coupling reaction of aryne precursor 1 with DMF and the active methylene compound dimedone (2). The one-pot synthesis of the title compound 5 from aryne precursor 1 was also achieved. Full article
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Open AccessShort Note 6-(4-Amino-1-methyl-2-(methylthio)-6-oxo-1,6-dihydro-pyrimidin-5-yl)-3,6-dimethyl-2-(methylthio)-6,7-dihydro-3H-pyrrolo[2,3-d]pyrimidine-4,5-dione
Molbank 2015, 2015(1), M842; doi:10.3390/M842
Received: 23 December 2014 / Revised: 12 January 2015 / Accepted: 27 January 2015 / Published: 5 February 2015
Cited by 2 | PDF Full-text (682 KB) | HTML Full-text | XML Full-text | Supplementary Files
Abstract
The title compound 6-(4-amino-1-methyl-2-(methylthio)-6-oxo-1,6-dihydro-pyrimidin-5-yl)-3,6-dimethyl-2-(methylthio)-6,7-dihydro-3H-pyrrolo[2,3-d]pyrimidine-4,5- dione was synthesized in 60% yield by a microwave-induced cyclocondensation reaction of aminopyrimidine with pyruvic acid in the presence of cerium ammonium nitrate (CAN) as catalyst. Full article
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Open AccessShort Note 10,10'-Dimethoxy-9,9'-biazuleno[2,1-c]phenanthrene
Molbank 2015, 2015(1), M843; doi:10.3390/M843
Received: 30 December 2014 / Revised: 6 February 2015 / Accepted: 9 February 2015 / Published: 13 February 2015
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Abstract
The title compound was prepared by the regioselective homocoupling of 10-methoxyazuleno[2,1-c]phenanthrene in the presence of ammonium persulfate. The structure of the synthesized compound was assigned on the basis of its 1H-NMR, FT-IR, and mass spectral data. Its crystal structure and
[...] Read more.
The title compound was prepared by the regioselective homocoupling of 10-methoxyazuleno[2,1-c]phenanthrene in the presence of ammonium persulfate. The structure of the synthesized compound was assigned on the basis of its 1H-NMR, FT-IR, and mass spectral data. Its crystal structure and electrochemical properties are also reported. Full article
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Open AccessShort Note N,N',N",N"'-Tetrakis(5,7-dimethyl-1,8-naphthyridine-2-yl)-3,3',5,5'-diphenylmethanetetracarboxamide
Molbank 2015, 2015(1), M844; doi:10.3390/M844
Received: 29 January 2015 / Accepted: 10 February 2015 / Published: 26 February 2015
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Abstract
Diphenylmethane-based compounds bearing heterocyclic recognition groups, capable to act as hydrogen bonding sites were established to be powerful receptors for carbohydrates. In this paper, we describe the synthesis of a further representative of this class of compounds, containing four 1,8-naphthyridine groups as recognition
[...] Read more.
Diphenylmethane-based compounds bearing heterocyclic recognition groups, capable to act as hydrogen bonding sites were established to be powerful receptors for carbohydrates. In this paper, we describe the synthesis of a further representative of this class of compounds, containing four 1,8-naphthyridine groups as recognition units. The title compound has been characterized by elemental analysis, 1H-NMR, 13C-NMR and mass spectrometry. Full article
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Open AccessShort Note 1,5-(4,4'-Dipyridyl)naphthalene
Molbank 2015, 2015(1), M845; doi:10.3390/M845
Received: 6 January 2015 / Revised: 10 February 2015 / Accepted: 11 February 2015 / Published: 26 February 2015
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Abstract
The title compound has been prepared from 1,5-dibromonaphthalene (obtained from 1,5-diaminonaphthalene) using Suzuki-Miyaura cross-coupling to 4-pyridylboronic acid. The crystal and molecular structure was determined by single-crystal X-ray diffraction. Full article
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Open AccessShort Note Syn-Ethyl 1-hydroxy-7-methoxy-2,3-dihydro-1H-pyrrolo[3,4-b]quinolone-3-carboxylate HCl Salt
Molbank 2015, 2015(1), M846; doi:10.3390/M846
Received: 12 December 2014 / Revised: 24 February 2015 / Accepted: 26 February 2015 / Published: 3 March 2015
Cited by 1 | PDF Full-text (373 KB) | HTML Full-text | XML Full-text | Supplementary Files
Abstract
This short note describes a one-step synthesis of the title compound from commercially available starting materials and reports its full spectroscopic characterization data. Full article
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Open AccessShort Note N,N-Bis(3β-acetoxypregn-5(6)-en-20-on-16α-yl)hydroxylamine
Molbank 2015, 2015(1), M847; doi:10.3390/M847
Received: 5 January 2015 / Revised: 2 March 2015 / Accepted: 3 March 2015 / Published: 10 March 2015
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Abstract
A steroid with the dimeric structure, N,N-bis(3β-acetoxypregn-5(6)-en-20-on-16α-yl)hydroxylamine was synthesized in the base catalyzed reaction of 3β-acetoxypregn-5,16-dien-20-one with O-(trimethylsilyl)hydroxylamine. The structure of the product was determined by NMR (including 2D techniques), FAB MS, IR spectroscopy and elemental analysis. Full article
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Open AccessShort Note Ethyl 4,4''-Dibromo-5'-(butylamino)-2',6'-dinitro-[1,1':3',1''-terphenyl]-4'-carboxylate
Molbank 2015, 2015(1), M848; doi:10.3390/M848
Received: 1 December 2014 / Accepted: 13 March 2015 / Published: 18 March 2015
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Abstract
Ethyl 4,4''-Dibromo-5'-(butylamino)-2',6'-dinitro-[1,1':3',1''-terphenyl]-4'-carboxylate (2) which is a m-terphenyl derivative containing an hexasubstituted, highly functionalized substituted benzene core, has been synthesized. Full article
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Open AccessShort Note Dimethyl 6-Amino-1-methyl-9H-carbazole-2,3-dicarboxylate
Molbank 2015, 2015(1), M849; doi:10.3390/M849
Received: 25 February 2015 / Accepted: 17 March 2015 / Published: 18 March 2015
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Abstract
The title compound (2) was prepared in high yield by catalytic transfer hydrogenation of the 6-nitro precursor (1), using hydrazine hydrate as the hydrogen source. Under the conditions employed, the ester groups remain unaffected. The new compound was fully
[...] Read more.
The title compound (2) was prepared in high yield by catalytic transfer hydrogenation of the 6-nitro precursor (1), using hydrazine hydrate as the hydrogen source. Under the conditions employed, the ester groups remain unaffected. The new compound was fully characterised by elemental analysis, 1H-NMR, 13C-NMR, MS and HRMS data. Full article
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