675-14-9Relevant academic research and scientific papers
Synthesis of (±) wine lactone and its analogues by a diels-alder approach
O'Connor, Patrick D.,Bin Kim,Brimble, Margaret A.
, p. 4405 - 4411 (2009)
A novel route to (±)-wine lactone (1) by a cis-selective kinetically controlled intramolecular Diels-Alder (IMDA) cycloaddition of the linear triene 2 is reported. The triene precursor was synthesised by TBAF-catalysed coupling of an acyl fluoride with an silyl enol ether. Four butadienyl but-3-enoates were prepared and cyclised under mild conditions to give a series of wine lactone analogues. The diastereoselectivity of the IMDA cycloadditions was determined by NMR spectroscopy and GC-MS, whereby the formation of the natural cis-configured wine lactone (1) was established. The diastereomeric IMDA transition states were optimised by using density functional theory at the B3LYP/6-31+G(d) level, and the Boltzmann populations of the electronic energies were found to correlate well with the experimentally observed diastereoselectivity.
PROCESS AND DEVICE FOR PREPARING ENVIRONMENTALLY-FRIENDLY INSULATING GAS PERFLUOROALKYLNITRILE
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Paragraph 0024-0025, (2020/04/24)
Provided are a process and a device for preparing environmentally-friendly insulating gas perfluoroalkylnitrile. The device comprises a first tank reactor, a second tank reactor, and a fixed bed reactor. A condensing and collecting device is provided at the top of the first tank reactor, a collecting and guiding channel at the bottom of the condensing and collecting device is connected to an inlet of a storage tank, and an outlet of the storage tank is connected to an inlet of the second tank reactor. The second tank reactor is connected to a perfluoroolefin tank. An outlet of the second tank reactor is connected to a storage gasification tank. The storage gasification tank is connected to a carrier gas tank, and an outlet of the storage gasification tank is connected to an inlet of the fixed bed reactor. The present invention starts from cyanuric chloride and perfluoropropylene, and uses two tank reactors and a fixed bed reactor to realize production with high atom economy. The preparation method has simple reaction conditions, high atom economy, low cost, and is continuous and enables scale production.
Cyanuric fluoride preparation method
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Paragraph 0025-0028; 0029-0032; 0033-0038; 0039-0048, (2018/05/07)
The invention discloses a cyanuric fluoride preparation method. According to the method, 1, 3, 5-trichlorine s-triazine and tetrabutylammonium fluoride are subjected to fluorination to obtain cyanuricfluoride and tetrabutylammonium chloride. Catalysts are omitted, reaction selectivity is high, yield can reach up to 95%, usage of hydrogen fluoride serving as a high-risk fluorine reagent or a largequantity of metal fluoride and addition of expensive catalysts are avoided, and the method has the advantages of simplicity in operation, mild reaction conditions, low cost and the like, and is suitable for industrial production.
Ionic liquids as media for nucleophilic flurination
Murray, Christopher B.,Sandford, Graham,Korn, Stewart R.
, p. 81 - 84 (2007/10/03)
The use of Room Temperature Ionic Liquids (RTILs) for a variety of halogen exchange (Halex) fluorination processes using alkali metal fluorides is assessed. Whilst fluorination of a range of halogenated substrates is possible in good yield, the utility of RTILs as reusable, inert media for such reactions is limited by the gradual decomposition of the RTIL in the presence of highly basic fluoride ion.
Improved syntheses of cyanuric fluoride and carboxylic acid fluorides
Gross, Steffen,Laabs, Stephan,Scherrmann, Andreas,Sudau, Alexander,Zhang, Nong,Nubbemeyer, Udo
, p. 711 - 714 (2007/10/03)
Cyanuric fluoride (2) is one of the most popular fluorinating agents in organic chemistry. The title compound could be prepared in a 50 to 100 g scale by means of a chlorine fluorine exchange, the process was characterized by a simple preparation procedure, cheap reactants and a low time exposure. Carboxylic acids were converted into the corresponding acid fluorides 4a-g using cyanuric fluoride. A non-aqueous work-up led to high yields on synthesizing a range of functionalized acid fluorides. Wiley-VCH Verlag GmbH, 2000.
Synthesis and use of amino acid fluorides as peptide coupling reagents
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, (2008/06/13)
The present invention is directed to the process of preparing a peptide comprising reacting a first amino acid or peptide with an amino acid fluoride of the formula: STR1 or the acid fluoride salts thereof wherein BLK is an N-amino protecting group AA is an amino acid residue and X is H or a protecting group useful, and the first amino and peptide have a free amino group and a blocked carboxy end.
Synthesis and use of amino acid fluorides as peptide coupling reagents
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, (2008/06/13)
A compound of the formula STR1 or the acid fluoride salts thereof wherein BLK is an N-amino protecting group or hydrogenAA is an amino acid residue andX is H or a protecting group useful as a coupling agent in peptide synthesis.
Process for the preparation of 2,4,6-trifluoro-1,3,5-triazine
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, (2008/06/13)
A process for the preparation of 2,4,6-trifluoro-1,3,5-triazine (cyanuric fluoride) in high purity and high yield at relatively low temperatures by reacting 2,4,6-trichloro-1,3,5-triazine (cyanuric fluoride [sic]) or mixed chlorinated/fluorinated 1,3,5-triazines with at least the equivalent amount of sodium fluoride, potassium fluoride or cesium fluoride or any desired mixture of these alkali metal fluorides in a dipolar aprotic solvent at temperatures from about 30° C. to about 110° C. and isolating the 2,4,6-trifluoro-1,3,5-triazine formed by distillation.
Photochemistry of Halogenocarbon Compounds. Part 5. Photolysis of Fluorinated 1,2,3-Triazine Derivatives
Chambers, Richard D.,Shepherd, Thomas,Tamura, Masayuki
, p. 975 - 981 (2007/10/02)
Photolysis experiments are described on perfluoro-1,2,3-triazine (9) and its corresponding perfluoroisopropyl derivatives.A polymer was obtained from (9) but a dimer of perfluoro-2,4-di-isopropylazete (16) is obtained, from (15) quantitatively.The endo structure of the dimer is revealed by formation of a stable carbanion on addition of CsF.Trapping of the azete (16) with furan gave interconvertible 1:1 cycloaddition products.Products consistent with co-dimerisation of azetes are described.
Water-soluble dyestuffs containing fibre-reactive groups of the vinylsulfone series and the fluoro-s-triazinyl-amino series
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, (2008/06/13)
Water-soluble fibre-reactive dyestuffs containing one or two fibre-reactive groups of the vinylsulfone series and one or two fibre-reactive groups of the fluoro-s-triazinyl-amino series. These dyestuffs can be applied on fibre materials containing hydroxy and/or carbonamide groups by known application and fixation techniques for fibre-reactive dyes to yield deep and fast dyeings on these materials.

