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Molbank
Volume 2016
Issue 3
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Molbank, Volume 2016, Issue 3 (September 2016) – 6 articles

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3 pages, 478 KiB  
Short Note
(E)-3-Methyl-6-(3-oxo-3-(3,4,5-trimethoxyphenyl)prop-1-en-1-yl)-2(3H)-benzothiazolone
by Yordanka Ivanova, Mariana Gerova, Christo Chanev and Ognyan Petrov
Molbank 2016, 2016(3), M907; https://doi.org/10.3390/M907 - 3 Sep 2016
Viewed by 3415
Abstract
The title compound, (E)-3-methyl-6-(3-oxo-3-(3,4,5-trimethoxyphenyl)prop-1-en-1-yl)-2(3H)-benzothiazolone, was synthesized by both an acid- and base-catalyzed aldol condensation of 3-methyl-6-acetyl-2(3H)-benzothiazolone and 3,4,5-trimethoxyacetophenone. The structure of the target compound was confirmed using 1H-NMR, 13C-NMR, IR, MS, and elemental analysis. Full article
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5 pages, 866 KiB  
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5,9,11-Trihydroxy-2,2-dimethyl-10-(3′-methyl-2′-butenyl)-3-(2″-methyl-3″-butenyl)pyrano[2,3-a]xanthen-12(2H)-one from the Stem Bark of Calophyllum pseudomole
by Mulyadi Tanjung, Ratih Dewi Saputri and Tjitjik Srie Tjahjandarie
Molbank 2016, 2016(3), M906; https://doi.org/10.3390/M906 - 22 Aug 2016
Cited by 7 | Viewed by 3626
Abstract
5,9,11-Trihydroxy-2,2-dimethyl-10-(3′-methyl-2′-butenyl)-3-(2″-methyl-3″-butenyl)-pyrano[2,3-a]xanthen-12(2H)-one (1) was isolated from the stem bark of Calophyllum pseudomole. The structure of 1 was established by spectroscopic analysis which included UV, IR, HRESIMS and NMR experiments. Full article
(This article belongs to the Section Natural Product Chemistry)
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5 pages, 432 KiB  
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1,3-Butanediol Dibenzoate
by Wataru Hakamata, Kaho Goto, Sakiko Ishiwata, Rieka Ouki, Riku Sakai, Arisa Iizuka, Shuta Yano, Takako Hirano and Toshiyuki Nishio
Molbank 2016, 2016(3), M905; https://doi.org/10.3390/M905 - 17 Aug 2016
Viewed by 3850
Abstract
Environmentally friendly and straightforward methods for creating biofuels are required to promote biofuel use. Therefore, we present here a convenient and environmentally friendly direct self-aldol reaction of acetaldehyde in 100 mM borate buffer (pH 10) affording the dimer of 3-hydroxybutanal with a good [...] Read more.
Environmentally friendly and straightforward methods for creating biofuels are required to promote biofuel use. Therefore, we present here a convenient and environmentally friendly direct self-aldol reaction of acetaldehyde in 100 mM borate buffer (pH 10) affording the dimer of 3-hydroxybutanal with a good yield. The product can be easily converted into 1,3-butanediol and its benzoate; therefore, our results will have a positive impact in the field of biochemical production from ethanol. Full article
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4 pages, 327 KiB  
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Octanoic Hydrazide-Linked Chitooligosaccharides-2,5-Anhydro-d-Mannofuranose
by Amani Moussa and Stéphane Trombotto
Molbank 2016, 2016(3), M904; https://doi.org/10.3390/M904 - 16 Aug 2016
Cited by 5 | Viewed by 4156
Abstract
Chitooligosaccharide with one 2,5-anhydro-d-mannofuranose unit at the reducing end (COSamf) was prepared by nitrous acid depolymerization of chitosan. The reducing-end functionalization of COSamf by reductive amination with octanoic hydrazide in the presence of NaBH3CN was achieved in high yield. [...] Read more.
Chitooligosaccharide with one 2,5-anhydro-d-mannofuranose unit at the reducing end (COSamf) was prepared by nitrous acid depolymerization of chitosan. The reducing-end functionalization of COSamf by reductive amination with octanoic hydrazide in the presence of NaBH3CN was achieved in high yield. The chemical structure of the targeted octanoic hydrazide-linked COSamf was fully characterized by NMR spectroscopy and MALDI-TOF mass spectrometry. This synthesis opens the way to a new generation of COSamf derivatives with potential amphiphilic properties. Full article
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6 pages, 2573 KiB  
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N-[(1E)-(3-Bromophenyl)methylene]-N-(2-piperidin-1-ylethyl)amine
by Ismail Warad, Yasmin Al-Demeri, Mohammmed Al-Nuri, Mohammed Suleiman, Anas Al-Ali and Sameer Amereih
Molbank 2016, 2016(3), M903; https://doi.org/10.3390/M903 - 27 Jul 2016
Cited by 2 | Viewed by 3529
Abstract
N-[(1E)-(3-Bromophenyl)methylene]-N-(2-piperidin-1-ylethyl)amine Schiff base was prepared in good yield and characterized by the reflux of equivalent amounts of 2-(piperidin-1-yl)ethanamine with 3-bromobenzaldehyde. The structure of the desired Schiff base was analyzed based on: elemental analysis, EI-MS, TG/DTG, UV-visible, FT-IR, 1 [...] Read more.
N-[(1E)-(3-Bromophenyl)methylene]-N-(2-piperidin-1-ylethyl)amine Schiff base was prepared in good yield and characterized by the reflux of equivalent amounts of 2-(piperidin-1-yl)ethanamine with 3-bromobenzaldehyde. The structure of the desired Schiff base was analyzed based on: elemental analysis, EI-MS, TG/DTG, UV-visible, FT-IR, 1H and 13C-NMR spectral analysis. The condensation reaction was monitored by FT-IR. Full article
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3 pages, 456 KiB  
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1,4-Phenylenebis[(6,7-dimethoxy-3,4-dihydroisoquinolin-2(1H)-yl)methanone]
by Stanimir Manolov and Iliyan Ivanov
Molbank 2016, 2016(3), M902; https://doi.org/10.3390/M902 - 28 Jun 2016
Viewed by 3872
Abstract
The compound named in the title was prepared from N1,N4-diphenethylterephthalamide 1. The resulting bis terephthalamide was subjected to an intramolecular α-amidoalkylation reaction with paraformaldehyde in the presence of heterogeneous catalyst TfOH/SiO2 to obtain 1,4-phenylenebis[(6,7-dimethoxy-3,4-dihydroisoquinolin-2(1H [...] Read more.
The compound named in the title was prepared from N1,N4-diphenethylterephthalamide 1. The resulting bis terephthalamide was subjected to an intramolecular α-amidoalkylation reaction with paraformaldehyde in the presence of heterogeneous catalyst TfOH/SiO2 to obtain 1,4-phenylenebis[(6,7-dimethoxy-3,4-dihydroisoquinolin-2(1H)-yl)methanone]. The structure of the newly synthesized compound was determined using 1H, 13C-NMR, UV, IR and mass spectral data. Full article
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