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Molbank
Volume 2013
Issue 2
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Molbank, Volume 2013, Issue 2 (June 2013) – 6 articles

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5 pages, 89 KiB  
Short Note
2'-[(4-Fluorophenyl)carbonyl]-1'-phenyl-1',2',5',6',7',7a'-hexahydrospiro[indole-3,3'-pyrrolizin]-2(1H)-one
by Majal Sapnakumari, Badiadka Narayana, Seranthimata Samshuddin and Balladka Kunhanna Sarojini
Molbank 2013, 2013(2), M802; https://doi.org/10.3390/M802 - 23 May 2013
Cited by 2 | Viewed by 3665
Abstract
A new spiro[indole-3,3'-pyrrolizine] derivative is regioselectively synthesized by the straightforward multicomponent reaction of 1-(4-fluorophenyl)-3-phenylprop-2-en-1-one, isatin and L-proline without any catalyst. The structure of the newly synthesized compound is characterized by IR, NMR, UV-visible and mass spectral data. The compound is also screened for [...] Read more.
A new spiro[indole-3,3'-pyrrolizine] derivative is regioselectively synthesized by the straightforward multicomponent reaction of 1-(4-fluorophenyl)-3-phenylprop-2-en-1-one, isatin and L-proline without any catalyst. The structure of the newly synthesized compound is characterized by IR, NMR, UV-visible and mass spectral data. The compound is also screened for its reducing power assay. Full article
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4 pages, 188 KiB  
Short Note
(R)-7-(Azepan-3-ylamino)-8-chloro-1-cyclopropyl-6-fluoro-4-oxo-1,4-dihydroquinoline-3-carboxylic Acid Hydrochloride
by Zhengjun Xia, Zaixin Chen and Shuitao Yu
Molbank 2013, 2013(2), M801; https://doi.org/10.3390/M801 - 22 May 2013
Viewed by 4385
Abstract
In this paper (R)-7-(azepan-3-ylamino)-8-chloro-1-cyclopropyl-6-fluoro-4-oxo-1,4-dihydroquinoline-3-carboxylic acid hydrochloride 1 was isolated and identified as the N-substituted regioisomer of besifloxacin, which has been synthesized from the reaction of 8-chloro-1-cyclopropyl-6,7-difluoro-4-oxo-1,4-dihydroquinoline-3-carboxylic acid 3 with (R)-tert-butyl 3-aminoazepane-1-carboxylate 2 in acetonitrile as solvent in 37% [...] Read more.
In this paper (R)-7-(azepan-3-ylamino)-8-chloro-1-cyclopropyl-6-fluoro-4-oxo-1,4-dihydroquinoline-3-carboxylic acid hydrochloride 1 was isolated and identified as the N-substituted regioisomer of besifloxacin, which has been synthesized from the reaction of 8-chloro-1-cyclopropyl-6,7-difluoro-4-oxo-1,4-dihydroquinoline-3-carboxylic acid 3 with (R)-tert-butyl 3-aminoazepane-1-carboxylate 2 in acetonitrile as solvent in 37% yield. The chemical structure of compound 1 was established on the basis of 1H-NMR, 13C-NMR, mass spectrometry data and elemental analysis. Full article
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4 pages, 68 KiB  
Short Note
2-{[5-(Diphenylmethyl)-1,3,4-oxadiazol-2-yl]sulfanyl}-N-(pyrazin-2-yl)acetamide
by Prakash S. Nayak, Badiadka Narayana, Seranthimata Samshuddin and Balladka Kunhanna Sarojini
Molbank 2013, 2013(2), M800; https://doi.org/10.3390/M800 - 3 May 2013
Cited by 1 | Viewed by 4906
Abstract
S-Alkylation of 5-(diphenylmethyl)-1,3,4-oxadiazole-2(3H)-thione (3) by 2-chloro-N-(pyrazin-2-yl)acetamide (2) affords the title compound, 2-{[5-(diphenylmethyl)-1,3,4-oxadiazol-2-yl]sulfanyl}-N-(pyrazin-2-yl)acetamide (4). The intermediate (2), in turn, was prepared by the acetylation of 2-aminopyrazine (1) [...] Read more.
S-Alkylation of 5-(diphenylmethyl)-1,3,4-oxadiazole-2(3H)-thione (3) by 2-chloro-N-(pyrazin-2-yl)acetamide (2) affords the title compound, 2-{[5-(diphenylmethyl)-1,3,4-oxadiazol-2-yl]sulfanyl}-N-(pyrazin-2-yl)acetamide (4). The intermediate (2), in turn, was prepared by the acetylation of 2-aminopyrazine (1) with chloroacetyl chloride. The structure of the newly synthesized compound is characterized by IR, NMR and mass spectral data. Full article
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3 pages, 137 KiB  
Short Note
3,3'-(1,4-Phenylenebis(phenylazanediyl))bis(7-ethoxy-4-methyl-2H-chromen-2-one)
by Divia Narayanan and Karickal Raman Haridas
Molbank 2013, 2013(2), M799; https://doi.org/10.3390/M799 - 2 May 2013
Cited by 1 | Viewed by 3830
Abstract
3,3'-(1,4-Phenylenebis(phenylazanediyl))bis(7-ethoxy-4-methyl-2H-chromen-2-one) was synthesized from N,N'-diphenylbenzene-1,4-diamine and bromo-7-ethoxy-4-methylcoumarin based on Ullmann coupling reaction. The synthesized compound was characterized by UV-Visible, NMR, FT-IR, MS, elemental analysis and Fluorescence Spectrum. Full article
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7 pages, 132 KiB  
Short Note
N"-[(3Z)-1-Acetyl-5-chloro-2-oxo-1,2-dihydro-3H-indol-3-ylidene]thiocarbonohydrazide
by Nataša Ristovska, Frosa Anastasova and Marina Stefova
Molbank 2013, 2013(2), M798; https://doi.org/10.3390/M798 - 16 Apr 2013
Cited by 4 | Viewed by 5129
Abstract
A novel synthetic methodology for preparation of thiocarbohydrazone by reacting thiocarbohydrazide with 1-acetyl-5-chloroisatin is described. The title compound was prepared by condensation of thiocarbohydrazide and substituted isatin in aqueous ethanol. The newly synthesized compound was characterized using 1H-NMR, 13C-NMR, FT-IR and [...] Read more.
A novel synthetic methodology for preparation of thiocarbohydrazone by reacting thiocarbohydrazide with 1-acetyl-5-chloroisatin is described. The title compound was prepared by condensation of thiocarbohydrazide and substituted isatin in aqueous ethanol. The newly synthesized compound was characterized using 1H-NMR, 13C-NMR, FT-IR and mass spectrometry. Full article
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4 pages, 119 KiB  
Short Note
2-Chloro-7-methyl-3-({4-[(4-nitrophenoxy)methyl]-1H-1,2,3-triazol-1-yl}methyl)quinoline
by Koduru Sri Shanthi Praveena, Nandula Yadagiri Sreenivasa Murthy and Sarbani Pal
Molbank 2013, 2013(2), M797; https://doi.org/10.3390/M797 - 11 Apr 2013
Viewed by 4058
Abstract
The title compound, 2-chloro-7-methyl-3-({4-[(4-nitrophenoxy)methyl]-1H-1,2,3-triazol-1-yl}methyl)quinoline was synthesized in one pot. The structure of the compound was fully characterized by IR, 1H and 13C-NMR, mass spectral analysis and elemental analysis. Full article
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