Molbank2014, 2014(4), M836; doi:10.3390/M836 - published 28 October 2014 Show/Hide Abstract
Abstract: The title compound, N'-[2-(7,8-dimethyl-2,4-dioxo-3,4-dihydrobenzo[g]pteridin- 10(2H)-yl)ethylidene]-4-nitrobenzohydrazide (1), was obtained by the reaction of formylmethylflavin and p-nitrobenzohydrazide. The product 1 inhibited the DNA binding of nuclear factor-κB, and was characterized by 1H-NMR, 13C-NMR, electrospray ionization mass spectrometry, elemental analysis, IR and UV.
Molbank2014, 2014(3), M834; doi:10.3390/M834 - published 26 August 2014 Show/Hide Abstract
Abstract: Copper-catalyzed cross-coupling between (S)-S-methyl-S-phenylsulfoximine (1) and 2-iodobenzonitrile (2) resulted in the discovery of an unprecedented one-pot triple arylation sequence to give (R)-(−)-2-[(5-oxido-5-phenyl-5λ4-isoquino[4,3-c][2,1]benzothiazin- 12-yl)amino]benzonitrile (4). Here, we describe the synthesis of the title compound (R)-4 and the elucidation of its structure by means of various techniques.
Molbank2014, 2014(3), M833; doi:10.3390/M833 - published 22 August 2014 Show/Hide Abstract
Abstract: N2-tert-Butoxycarbonyl-N5-[N-(9-fluorenylmethyloxycarbonyl)-2-aminoethyl]-(S)-2,5-diaminopentanoic acid (5) has been synthesized by the reaction of N2-tert-butoxycarbonyl-L-2,5-diaminopentanoic acid (Boc-L-ornithine, 3) and N-Fmoc-2-aminoacetaldehyde (N-Fmoc-glycinal, 4) in the presence of sodium cyanoborohydride in methanol containing 1% acetic acid at room temperature.
Molbank2014, 2014(3), M832; doi:10.3390/M832 - published 19 August 2014 Show/Hide Abstract
Abstract: Chitooligosaccharide with one 2,5-anhydro-D-mannofuranose unit at the reducing end (COSamf) was prepared by nitrous deamination of fully N-deacetylated chitosan. The oxidation of the amf-unit by chlorite sodium was achieved in high yield. The chemical structure of the targeted chitooligosaccharide-2,5-anhydro-D-mannonic acid with a degree of polymerization ~10 was fully characterized by NMR spectroscopy, MALDI-TOF mass spectrometry and size-exclusion chromatography. The success of this synthesis opens the way to a new generation of end-functionalized COS building blocks.
Molbank2014, 2014(3), M831; doi:10.3390/M831 - published 6 August 2014 Show/Hide Abstract
Abstract: Novel synthesis of a 2-amino-3-cyano-2,6-diphenyl pyridine by a one-pot multi-component reaction of 1,3-diphenylpropane-1,3-dione, malononitrile and phenethylamine in the presence of N-hydroxybenzamide and zinc chloride has been reported. The structure of the synthesized compound was assigned on the basis of its elemental analysis, 1H-NMR, 13C-NMR, IR and mass spectral data. X-ray structure analysis confirmed unambiguously the proposed structure. The photophysical properties (λAbs., λFlu.) in CH3OH, CH3CN, CH2Cl2 and the emission spectrum of the new compound in solution and in the solid state are reported.