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Molbank
Volume 2015
Issue 1
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Molbank, Volume 2015, Issue 1 (March 2015) – 12 articles

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654 KiB  
Short Note
Dimethyl 6-Amino-1-methyl-9H-carbazole-2,3-dicarboxylate
by Norbert Haider and Katharina Tropper
Molbank 2015, 2015(1), M849; https://doi.org/10.3390/M849 - 18 Mar 2015
Cited by 2 | Viewed by 3135
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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818 KiB  
Short Note
Ethyl 4,4''-Dibromo-5'-(butylamino)-2',6'-dinitro-[1,1':3',1''-terphenyl]-4'-carboxylate
by Damiano Rocchi, Juan F. González and J. Carlos Menéndez
Molbank 2015, 2015(1), M848; https://doi.org/10.3390/M848 - 18 Mar 2015
Viewed by 2999
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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698 KiB  
Short Note
N,N-Bis(3β-acetoxypregn-5(6)-en-20-on-16α-yl)hydroxylamine
by Rita Skoda-Földes
Molbank 2015, 2015(1), M847; https://doi.org/10.3390/M847 - 10 Mar 2015
Cited by 1 | Viewed by 2764
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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373 KiB  
Short Note
Syn-Ethyl 1-hydroxy-7-methoxy-2,3-dihydro-1H-pyrrolo[3,4-b]quinolone-3-carboxylate HCl Salt
by Marcus Baumann and Ian R. Baxendale
Molbank 2015, 2015(1), M846; https://doi.org/10.3390/M846 - 3 Mar 2015
Cited by 2 | Viewed by 3095
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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777 KiB  
Short Note
1,5-(4,4'-Dipyridyl)naphthalene
by Mohammad R. Hassan and René T. Boeré
Molbank 2015, 2015(1), M845; https://doi.org/10.3390/M845 - 26 Feb 2015
Viewed by 3528
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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641 KiB  
Short Note
N,N',N",N"'-Tetrakis(5,7-dimethyl-1,8-naphthyridine-2-yl)-3,3',5,5'-diphenylmethanetetracarboxamide
by Ute Schmidt and Monika Mazik
Molbank 2015, 2015(1), M844; https://doi.org/10.3390/M844 - 26 Feb 2015
Viewed by 3477
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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763 KiB  
Short Note
10,10'-Dimethoxy-9,9'-biazuleno[2,1-c]phenanthrene
by Kosuke Yamamoto, Ryota Nakamae, Hiroshi Suemune and Kazuteru Usui
Molbank 2015, 2015(1), M843; https://doi.org/10.3390/M843 - 13 Feb 2015
Cited by 1 | Viewed by 4087
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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682 KiB  
Short 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
by Pablo E. Romo, Jairo Quiroga, Braulio Insuasty, Manuel Nogueras and Justo Cobo
Molbank 2015, 2015(1), M842; https://doi.org/10.3390/M842 - 5 Feb 2015
Cited by 2 | Viewed by 3720
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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684 KiB  
Short 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
by Eito Yoshioka, Shigeru Kohtani and Hideto Miyabe
Molbank 2015, 2015(1), M841; https://doi.org/10.3390/M841 - 30 Jan 2015
Cited by 10 | Viewed by 3817
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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660 KiB  
Short Note
1,1,2,2,7,7,8,8-Octaethoxyocta-3,5-diyne
by Bjarte Holmelid and Leiv K. Sydnes
Molbank 2015, 2015(1), M840; https://doi.org/10.3390/M840 - 15 Jan 2015
Cited by 1 | Viewed by 3163
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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601 KiB  
Editorial
Acknowledgement to Reviewers of Molbank in 2014
by Molbank Editorial Office
Molbank 2015, 2015(1), M839; https://doi.org/10.3390/M839 - 8 Jan 2015
Viewed by 2466
Abstract
The editors of Molbank would like to express their sincere gratitude to the following reviewers for assessing manuscripts in 2014:[...] Full article
506 KiB  
Short Note
5,5-Dimethyl-2,2-di(pyridin-2-yl)hexahydropyrimidine
by Ahmad. Abu-Obaid, Ahmad I. Asadi, Afaf. Alruwaili, Heba. Atieh, Shoqour Khlaif, Taibi Ben Hadda, Smaail Radi, Belkheir Hammouti and Ismail Warad
Molbank 2015, 2015(1), M838; https://doi.org/10.3390/M838 - 24 Dec 2014
Cited by 1 | Viewed by 4319
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, [...] Read more.
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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