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Molbank
Volume 2009
Issue 3
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Molbank, Volume 2009, Issue 3 (September 2009) – 21 articles

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5 pages, 170 KB  
Short Note
A New Flavonoid Glycoside from Salix denticulata Aerial Parts
by Usha Rawat, Sushma Semwal, Deepak Kumar Semwal, Ruchi Badoni and Amita Bamola
Molbank 2009, 2009(3), M622; https://doi.org/10.3390/M622 - 23 Sep 2009
Cited by 4 | Viewed by 8728
Abstract
Abstract: A new flavonoid glycoside (1) has been isolated from the aerial parts of Salix denticulata (Salicaceae) together with five known compounds, β-sitosterol, 2,6-dihydroxy- 4-methoxy acetophenone, eugenol-1-O-β-D-glucopyranoside, 1-O-β-D-(3’-benzoyl) salicyl alcohol and luteolin-7-O-β-D-glucopyranosyl-(1-6)-glucopyranoside. The structure of 1 was [...] Read more.
Abstract: A new flavonoid glycoside (1) has been isolated from the aerial parts of Salix denticulata (Salicaceae) together with five known compounds, β-sitosterol, 2,6-dihydroxy- 4-methoxy acetophenone, eugenol-1-O-β-D-glucopyranoside, 1-O-β-D-(3’-benzoyl) salicyl alcohol and luteolin-7-O-β-D-glucopyranosyl-(1-6)-glucopyranoside. The structure of 1 was elucidated as 2’,5-dihydroxy-3’-methoxyflavone-7-O-β-D-glucopyranoside by means of chemical and spectral data including 2D NMR studies. Full article
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Figure 1

3 pages, 23 KB  
Short Note
Synthesis of 4-[10H-Phenothiazin-10-yl(1H-tetrazol-5-yl)-methyl]phenol
by Bathey R. Venkatraman and Helen P. Kavitha
Molbank 2009, 2009(3), M621; https://doi.org/10.3390/M621 - 22 Sep 2009
Cited by 3 | Viewed by 5772
Abstract
This present work aims at synthesizing a novel tetrazole from phenothiazine. Phenothiazine is converted into a nitrile by reacting it with 4-hydroxybenzaldehyde, sodium metabisulphite and sodium cyanide. The nitrile on treatment with NaN3/DMF yielded the corresponding tetrazole. The tetrazole obtained was [...] Read more.
This present work aims at synthesizing a novel tetrazole from phenothiazine. Phenothiazine is converted into a nitrile by reacting it with 4-hydroxybenzaldehyde, sodium metabisulphite and sodium cyanide. The nitrile on treatment with NaN3/DMF yielded the corresponding tetrazole. The tetrazole obtained was characterized by IR, 1H NMR, EI-MS and elemental analysis. Full article
3 pages, 141 KB  
Short Note
5-Chloro-4-iodo-1,3-dimethyl-1H-pyrazole
by Gytė Vilkauskaitė, Gernot A. Eller, Algirdas Šačkus and Wolfgang Holzer
Molbank 2009, 2009(3), M620; https://doi.org/10.3390/M620 - 21 Sep 2009
Cited by 2 | Viewed by 6312
Abstract
Reaction of 5-chloro-1,3-dimethyl-1H-pyrazole with I2/HIO3 in refluxing acetic acid gives the title compound in good yield. Detailed spectroscopic data (1H NMR, 13C NMR, 15N NMR, IR, MS) are presented. Full article
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Scheme 1

4 pages, 33 KB  
Short Note
Regioselective Alkylation of an Oxonaphthalene-Annelated Pyrrol System
by Helmut Spreitzer and Christiane Puschmann
Molbank 2009, 2009(3), M619; https://doi.org/10.3390/M619 - 15 Sep 2009
Cited by 5 | Viewed by 5611
Abstract
The regioselective alkylation of an oxonaphthalene-annelated pyrrole system is reported. The regioselectivity of alkylation can be controlled by the selection of the solvent. Full article
3 pages, 87 KB  
Short Note
N-[(2-Chloro-6-methylquinolin-3-yl)methyl]aniline
by Suresh Kumar, Sandhya Bawa and Sushma Drabu
Molbank 2009, 2009(3), M618; https://doi.org/10.3390/M618 - 14 Sep 2009
Cited by 4 | Viewed by 6118
Abstract
Quinolinyl amines are important organic compounds which possess a variety of pharmacological activities such as antimalarial, antifungal, hypotensive and antidepressant activity. Full article
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Figure 1

2 pages, 29 KB  
Short Note
Synthesis of 3-Methyl-1-morpholin-4-ylmethyl-2,6-diphenylpiperidin-4-one
by Samiappan Sathish Kumar, Helen P. Kavitha and Bathey R. Venkatraman
Molbank 2009, 2009(3), M617; https://doi.org/10.3390/M617 - 10 Sep 2009
Viewed by 5851
Abstract
This paper describes the synthesis of 3-methyl-1-morpholin-4-ylmethyl-2,6-diphenylpiperidin-4-one from 3-methyl-2,6-diphenylpiperidin-4-one. The synthesized compound was characterized by FT-IR, 1H NMR, EI-MS and elemental analysis. Full article
4 pages, 105 KB  
Short Note
Mercuric(II) Acetate Oxidation of Steroidal Exocyclic α,β-Unsaturated Ketone: Transformation into a Cyclic Ether
by Pranab Ghosh, Antara Sarkar and Jayanta Das
Molbank 2009, 2009(3), M616; https://doi.org/10.3390/M616 - 1 Sep 2009
Cited by 1 | Viewed by 5694
Abstract
16-Dehydropregnenolone acetate (16-DPA) (1), an exocyclic α,β-conjugated ketone having a steroidal skeleton, when treated with mercuric(II) acetate in acetic acid furnished a single compound identified as (2). The structure of compound (2) has been elucidated on the basis of spectral data analysis (IR, [...] Read more.
16-Dehydropregnenolone acetate (16-DPA) (1), an exocyclic α,β-conjugated ketone having a steroidal skeleton, when treated with mercuric(II) acetate in acetic acid furnished a single compound identified as (2). The structure of compound (2) has been elucidated on the basis of spectral data analysis (IR, NMR and MS). Full article
2 pages, 135 KB  
Short Note
4,6-Diamino-5-[4-(dimethylamino)benzylidene]pyrimidin-2(5H)-one
by Gricela Lobo, Jaime Charris, Margaret Valderrama and Antonieta Taddei
Molbank 2009, 2009(3), M615; https://doi.org/10.3390/M615 - 31 Aug 2009
Cited by 1 | Viewed by 5428
Abstract
A new compound, 4,6-diamino-5-[4-(dimethylamino)benzylidene]pyrimidin-2(5H)-one, was synthesized and its IR, 1H NMR and 13C NMR and MS spectroscopic data are presented. Full article
4 pages, 188 KB  
Short Note
Synthesis and Characterization of a Novel 2-Pyrazoline
by Pramod Singh, Jagmohan S. Negi, Geeta Joshi Nee Pant, Mohan S. M. Rawat and Asha Budakoti
Molbank 2009, 2009(3), M614; https://doi.org/10.3390/M614 - 10 Aug 2009
Cited by 8 | Viewed by 9916
Abstract
Reaction of dibenzalacetone with hydrazine hydrate and formic acid yielded a novel 2-pyrazoline 1, characterized by ESI-MS, FT-IR, UV, 1HNMR and 13CNMR data and microanalysis. Full article
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Scheme 1

3 pages, 215 KB  
Short Note
Synthesis of a 2-Furylpyrazoline Derivative Using Microwave Irradiation
by Balapragalathan Thappali Jothikrishnan and Suban Syed Shafi
Molbank 2009, 2009(3), M613; https://doi.org/10.3390/M613 - 10 Aug 2009
Viewed by 5302
Abstract
A simple method for the synthesis of pyrazoline derivative containing furan moiety was developed. Thus, 5-(6-bromo-1,3-benzodioxol-5-yl)-3-(2-furyl)-1-(3-methyl-phenyl)-4,5-dihydro-1H-pyrazole was synthesized using microwave irradiation and it was characterized by NMR, IR, and LCMS. Full article
4 pages, 225 KB  
Short Note
Synthesis of Bis (1-Methyl-2-octynyl) Ether
by David Díaz Díaz and Víctor S. Martín
Molbank 2009, 2009(3), M612; https://doi.org/10.3390/M612 - 5 Aug 2009
Viewed by 8470
Abstract
The synthesis of bis (1-methyl-2-octynyl) ether using two secondary alcohols under Nicholas reaction conditions is reported. The reaction is possible due to a catalytic participation of the Lewis acid when the nucleophilic alcohol is protected as a THPO-ether. Full article
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Scheme 1

3 pages, 30 KB  
Short Note
2-(4-Pentyloxyphenyl)benzothiazole
by Sie Tiong Ha, Teck Ming Koh, Siew Teng Ong, Teck Leong Lee and Yasodha Sivasothy
Molbank 2009, 2009(3), M611; https://doi.org/10.3390/M611 - 4 Aug 2009
Cited by 2 | Viewed by 6327
Abstract
2-(4-Pentyloxyphenyl)benzothiazole was synthesized and its IR, 1H NMR and MS spectroscopic data are presented. Full article
3 pages, 87 KB  
Short Note
2-(4-Heptyloxyphenyl)benzothiazole
by Sie-Tiong Ha, Teck-Ming Koh, Siew-Teng Ong, Teck-Leong Lee and Yasodha Sivasothy
Molbank 2009, 2009(3), M610; https://doi.org/10.3390/M610 - 30 Jul 2009
Viewed by 6291
Abstract
2-(4-Heptyloxyphenyl)benzothiazole was synthesized and its IR, 1H NMR and MS spectroscopic data are presented. Full article
3 pages, 87 KB  
Short Note
Synthesis of 2-(4-Propyloxyphenyl)benzothiazole
by Sie-Tiong Ha, Teck-Ming Koh, Siew-Teng Ong, Teck-Leong Lee and Yasodha Sivasothy
Molbank 2009, 2009(3), M609; https://doi.org/10.3390/M609 - 30 Jul 2009
Cited by 5 | Viewed by 6831
Abstract
A new 2-(4-propyloxyphenyl)benzothiazole was synthesized and its IR, 1H and 13C NMR and MS spectroscopic data are presented. Full article
3 pages, 51 KB  
Short Note
Synthesis of a New Liquid Crystal, 3-Hydroxy-4-{[(6-methoxy-1,3-benzothiazol-2-yl)imino]methyl}phenyl Palmitate
by Sie-Tiong Ha, Teck-Ming Koh, Siew-Teng Ong, Jun-Kit Beh and Lay-Khoon Ong
Molbank 2009, 2009(3), M608; https://doi.org/10.3390/M608 - 30 Jul 2009
Cited by 4 | Viewed by 7257
Abstract
A new Schiff base ester comprising of heterocyclic moiety, 3-hydroxy-4-{[(6-methoxy-1,3-benzothiazol-2-yl)imino]methyl}phenyl palmitate was synthesized and its IR, 1H NMR, 13C NMR, elemental analysis and MS spectroscopic data are presented. Full article
3 pages, 128 KB  
Short Note
Synthesis of 2-[4-(4-Chlorophenyl)piperazin-1-yl]-2-methylpropanoic Acid Ethyl Ester
by Hari N. Pati, Bijay K. Mishra and Vijay S. Satam
Molbank 2009, 2009(3), M607; https://doi.org/10.3390/M607 - 27 Jul 2009
Viewed by 6763
Abstract
The title compound was synthesized by N-alkylation of 4-(4-chlorophenyl)piperazine with ethyl 2-bromo-2-methylpropanoate and its IR, 1H NMR, 13C NMR and Mass spectroscopic data are reported. Full article
3 pages, 29 KB  
Short Note
Synthesis of a New Heterocycle with Liquid Crystal Properties: 2-(3-Methoxy-4-hexadecanoyloxyphenyl)benzothiazole
by Sie-Tiong Ha, Teck-Ming Koh, Siew-Teng Ong and Lay-Khoon Ong
Molbank 2009, 2009(3), M606; https://doi.org/10.3390/M606 - 21 Jul 2009
Cited by 3 | Viewed by 6436
Abstract
A new heterocycle 2-(3-methoxy-4-hexadecanoyloxyphenyl)benzothiazole was synthesized and its IR, 1H NMR, 13C NMR and MS spectroscopic data are presented. Full article
4 pages, 157 KB  
Short Note
4,4’-[(2-Chlorophenyl)methylene]bis[1-phenyl-3-(trifluoromethyl)-1H-pyrazol-5-ol]
by Changbin Guo and Wolfgang Holzer
Molbank 2009, 2009(3), M605; https://doi.org/10.3390/M605 - 16 Jul 2009
Cited by 2 | Viewed by 5668
Abstract
The reaction of 1-phenyl-3-trifluoromethyl-2-pyrazolin-5-one and 2-chlorobenzaldehyde leads to the title compound, which results from addition of a second pyrazolone unit to the primarily formed 1:1 condensation product. Detailed spectroscopic data (1H NMR, 13C NMR, 19F NMR, IR, MS) are presented. Full article
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Figure 1

3 pages, 81 KB  
Short Note
Synthesis of (E)-2,4-Dinitro-N-((2E,4E)-4-phenyl-5-(pyrrolidin-1-yl)penta-2,4-dienylidene)aniline
by Nosratollah Mahmoodi, Manuchehr Mamaghani, Ali Ghanadzadeh, Majid Arvand and Mostafa Fesanghari
Molbank 2009, 2009(3), M604; https://doi.org/10.3390/M604 - 7 Jul 2009
Viewed by 6622
Abstract
(E)-2,4-Dinitro-N-((2E,4E)-4-phenyl-5-(pyrrolidin-1-yl)penta-2,4-dienylidene) aniline dye was prepared in one pot by reaction of premade N-2,4-dinitrophenyl-3-phenylpyridinium chloride (DNPPC) and pyrrolidine in absolute MeOH. Full article
4 pages, 207 KB  
Short Note
3-Methyl-1-phenyl-1H-pyrazol-5-yl 2-Bromo-3-furan-carboxylate
by Wolfgang Holzer, Changbin Guo and Karin Schalle
Molbank 2009, 2009(3), M603; https://doi.org/10.3390/M603 - 3 Jul 2009
Cited by 3 | Viewed by 6638
Abstract
The reaction of 3-methyl-1-phenyl-2-pyrazolin-5-one and 2-bromo-3-furoyl chloride in the presence of Ca(OH)2 in 1,4-dioxane gave the title compound. The latter was also obtained in much higher yield upon reaction of the starting materials in the system dichloromethane / triethylamine. Detailed spectroscopic data [...] Read more.
The reaction of 3-methyl-1-phenyl-2-pyrazolin-5-one and 2-bromo-3-furoyl chloride in the presence of Ca(OH)2 in 1,4-dioxane gave the title compound. The latter was also obtained in much higher yield upon reaction of the starting materials in the system dichloromethane / triethylamine. Detailed spectroscopic data (1H NMR, 13C NMR, 15N NMR, IR, MS) are presented. Full article
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Scheme 1

5 pages, 174 KB  
Short Note
Preparation of 5-Bromo-2-naphthol: The Use of a Sulfonic Acid as a Protecting and Activating Group
by Renata Everett, Jillian Hamilton and Christopher Abelt
Molbank 2009, 2009(3), M602; https://doi.org/10.3390/M602 - 29 Jun 2009
Cited by 5 | Viewed by 8645
Abstract
The preparation of 5-bromo-2-naphthol (4) in three steps from 5-amino-2-naphthol (1) is described. A sulfonic acid group is introduced at the 1-position as an activating and protecting group for the Sandmeyer reaction. The sulfonate group allows for the use of only water and [...] Read more.
The preparation of 5-bromo-2-naphthol (4) in three steps from 5-amino-2-naphthol (1) is described. A sulfonic acid group is introduced at the 1-position as an activating and protecting group for the Sandmeyer reaction. The sulfonate group allows for the use of only water and sulfuric acid as solvents. The sulfonic acid is introduced with three equivalents of sulfuric acid, and it is removed in 20% aq. sulfuric acid. Full article
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Scheme 1

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