The reaction of 2,4,6-tris(trimethylsiloxy)-1,3,5-triazine with chlorocarbenium ions: a new access to 1-oxa-3-azabutatrienium and 2-azaallenium salts
摘要:
DOI:
10.1016/s0040-4020(01)82103-7
作为产物:
描述:
三甲基氯硅烷 、 氰尿酸 以
various solvent(s) 为溶剂,
反应 6.0h,
以95%的产率得到tris(trimethylsilyl)cyanurate
参考文献:
名称:
Synthesis of unnatural sugar nucleotides and their evaluation as donor substrates in glycosyltransferase-catalyzed reactions
摘要:
New unnatural sugar nucleotides, UDP-Fuc and CDP-Fuc were synthesized from fucose-beta-1-phosphate and nucleotide monophosphates activated as morpholidates. Furthermore, a nucleotide analogue was prepared by phosphorylation of 1-(beta-D-ribofuranosyl)cyan uric acid, itself obtained as a protected derivative by condensation of the persilylated derivative of cyanuric acid with 1-O-acetyl-2,3,5-tri-O-benzoyl-beta-D-ribofuranose in 74% yield. This phosphate activated according to the same procedure was condensed with fucose-beta-1-phosphate, affording a new sugar nucleotide conjugate (NDP-Fuc) which was evaluated together with UDP-Fuc, CDP-Fuc and ADP-Fuc, as facose donors in alpha-(1-->4/3)-fucosyltransferase (FucT-III) catalyzed reaction. Fucose transfer could be observed with each of the donors and kinetic parameters were determined using a fluorescent acceptor substrate. Efficiency of the four analogues towards FucT-III was in the following order: UDP-Fuc = ADP-Fuc > NDP-Fuc > CDP-Fuc.According to the same strategy ADP-GlcNAc was prepared from AMP-morpholidate and N-acetylglucosamine-alpha-1-phosphate; tested as a glucosaminyl donor towards Neisseria meningitidis N-acetylglucosaminyl transferase (LgtA), ADP-GlcNAc was recognized with 0.1% efficiency as compared with UDP-GlcNAc, the natural donor substrate. (C) 2004 Elsevier Ltd. All rights reserved.
Stereocontrolled Syntheses of Deoxyribonucleosides via Photoinduced Electron-Transfer Deoxygenation of Benzoyl-Protected Ribo- and Arabinonucleosides
作者:Zhiwei Wang、Daniel R. Prudhomme、Jason R. Buck、Minnie Park、Carmelo J. Rizzo
DOI:10.1021/jo0003652
日期:2000.9.1
arabinose, and xylose glycosylation precursors were synthesized bearing C2-esters capable of directing Vorbrüggen glycosylation. The key step is the regioselective deoxygenation of the desired hydroxyl group as either the benzoyl- or 3-(trifluoromethyl)benzoyl derivative. This deoxygenation is accomplished via a photoinduced electron-transfer (PET) mechanism using carbazole derivatives as the photosensitizer
Synthesis of Pyrimidines and Triazines in Ice: Implications for the Prebiotic Chemistry of Nucleobases
作者:César Menor-Salván、Dra. Marta Ruiz-Bermejo、Marcelo I. Guzmán、Susana Osuna-Esteban、Sabino Veintemillas-Verdaguer
DOI:10.1002/chem.200802656
日期:2009.4.20
nucleobases: Freeze–thaw cycles in urea (1) solutions under methane/nitrogen atmospheres lead, with application of an energy source, to the synthesis of pyrimidines (mainly cytosine (2) and uracil (3)), triazines (such as cyanuric acid (4)), and adenine. This synthesis appears to be dependent on the atmosphere and the freezing conditions. At room temperature, hydantoin (5) is obtained. However, a freezing
The Unexpected Base‐Pairing Behavior of Cyanuric Acid in RNA and Ribose versus Cyanuric Acid Induced Helicene Assembly of Nucleic Acids: Implications for the Pre‐RNA Paradigm
作者:Brooke A. Anderson、Kévin Fauché、Suneesh C. Karunakaran、Jayasudhan R. Yerabolu、Nicholas V. Hud、Ramanarayanan Krishnamurthy
DOI:10.1002/chem.202004397
日期:2021.2.24
which has implications for novel paradigms for reorganizing the structures of nucleic acids, the synthesis of long helicenes, and pre‐RNA world paradigms. The results caution against extrapolating the self‐assembly behavior of individual heterocycles from the level of monomers to oligomers because the base‐paring properties of (non‐)canonical nucleobases are impacted by the type of oligomeric backbone
Reaction of vanadocene dichloride with organosilicon derivatives of cyanuric acid and pyrimidine
作者:A. S. Gordetsov、S. V. Zimina、L. B. Loginova、A. V. Piskunov
DOI:10.1134/s1070363214070354
日期:2014.7
but does not enter directly the reaction with the corresponding organosilicon, organo-germanium or organotin derivatives of isocyanuric acid [4]. At the same time tris(η-cyclopentadienylvanadium) isocyanurate was prepared by the reaction of tris(tributylstannyl) isocyanurate with Сp2VСl, and bis(η-cyclopentadienylvanadium) diallyl isocyanurate was prepared by the reaction of Сp2VСl and Сp2V with silver
Synthesis, spectroscopic characterization, and X-ray crystal structure of tris(trimethylsilyl)cyanurate
作者:Nadia E.A. El-Gamel、Joerg Brand、Edwin Kroke
DOI:10.1080/00958970802499372
日期:2009.4.20
Tris(trimethylsilyl)cyanurate, C12H27N3O3Si3 (1), has been synthesized and characterized by elemental analysis, IR, Raman, 13C and 29Si NMR, and thermogravimetric methods. The molecular and crystalstructure has been determined by single crystal X-ray diffraction. This compound crystallized in space group P63/m (176), Z = 2 with a = 11.017(2), b = 11.017(2), c = 9.676(3) Å; α = 90°, β = 90°, γ = 120°