Molbank2016, 2016(3), M906; doi:10.3390/M906 - published 22 August 2016 Show/Hide Abstract
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 Calophyllumpseudomole. The structure of 1 was established by spectroscopic analysis which included UV, IR, HRESIMS and NMR experiments.
Molbank2016, 2016(3), M905; doi:10.3390/M905 - published 17 August 2016 Show/Hide Abstract
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 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.
Molbank2016, 2016(3), M904; doi:10.3390/M904 - published 16 August 2016 Show/Hide Abstract
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. 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.
Molbank2016, 2016(3), M903; doi:10.3390/M903 - published 27 July 2016 Show/Hide Abstract
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, 1H and 13C-NMR spectral analysis. The condensation reaction was monitored by FT-IR.
Molbank2016, 2016(3), M902; doi:10.3390/M902 - published 28 June 2016 Show/Hide Abstract
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)-yl)methanone]. The structure of the newly synthesized compound was determined using 1H, 13C-NMR, UV, IR and mass spectral data.
Molbank2016, 2016(2), M901; doi:10.3390/M901 - published 1 June 2016 Show/Hide Abstract
Abstract: A new hybrid molecule containing a triazole and a benzoxazolone ring was synthesized. The structure of 6-[(4-chlorophenyl)(1H-1,2,4-triazol-1-yl) methyl]-3-methyl-2(3H)-benzoxazolone was confirmed by IR, 1H-, 13C-NMR, MS and elemental analysis.