Biomimetic Oxidation of 2-Methylimidazole Derivative with a Chemical Model System for Cytochrome P-450.
作者:Hiroyuki Miyachi、Yoshio Nagatsu
DOI:10.1248/cpb.50.1137
日期:——
A chemicalmodel system for cytochromeP-450, consisting of tetraphenylporphyrin manganese chloride (TPPMnCl) and iodosylbenzene, efficiently oxidized 2-methylimidazole to 2-methylimidazolone. This system was next applied to 4-(2-methyl-1-imidazolyl)-2,2-diphenylbutyramide, a muscarinic acetylcholine receptor antagonist under clinical trial, affording the previously unisolated imidazole ring 5-mono-oxidized
Synthesis of Alaninyl andN-(2-Aminoethyl)glycinyl Amino Acid Derivatives Containing the Green Fluorescent Protein Chromophore in Their Side Chains for Incorporation into Peptides and Peptide Nucleic Acids
作者:Thorsten Stafforst、Ulf Diederichsen
DOI:10.1002/ejoc.200600729
日期:2007.2
Artificial aminoacids carrying either the chromophore of the GreenFluorescentProtein (GFP) or a modification as their sidechains have been synthesized: Boc-protected alaninylderivatives and Fmoc-protected N-(2-aminoethyl)glycine-functionalized aminoacids were obtained and could be applied in solid-phase peptidesynthesis. The incorporation of the GFP chromophore into N-(2-aminoethyl)glycine-PNA
Simple and Efficient Copper-Catalyzed Approach to 2,4-Disubstituted Imidazolones
作者:Xiaoyu Gong、Haijun Yang、Hongxia Liu、Yuyang Jiang、Yufen Zhao、Hua Fu
DOI:10.1021/ol1008813
日期:2010.7.16
Some imidazolone derivatives are biological and pharmaceutical active molecules and the chromophores of the fluorescent proteins. In this communication, a simple and efficient approach to 4-arylidene-2-alkyl-4,5-dihydro-1H-imidazol-5-ones (2,4-disubstituted imidazolones) has been developed, and the protocol uses readily available 2-bromo-3-alkylacrylic acids and amidines as the starting materials without addition of any ligand or additive. The reactions were performed under mild conditions. Therefore, the present method will be of wide application in organic chemistry and medicinal chemistry.
Kjaer, Acta Chemica Scandinavica (1947), 1953, vol. 7, p. 889,896
作者:Kjaer
DOI:——
日期:——
Photochromic DNA having fluorescent protein-inspired nucleosides
Molecular switches controlled by light stimuli can be applicable to the variety of the biological application. In this study, skeletal structures of a chromophore of fluorescent protein were applied as aglycones of newly designed photochromic nucleosides, "Fluorescent protein-inspired nuceloside: FIN". Phosphoramidite units of the photochromic nucleosides having imidazolinone derivatives with benzylidene or 3-pyridilidene groups were successfully synthesized for FIN-containing ODNs. Thermodynamic studies of the FIN-containing ODNs revealed that photo-irradiation with specific wavelength induced stability change of the duplexes. (C) 2018 Elsevier Ltd. All rights reserved.