Results 11 to 20 of about 2,380,041 (121)
The influence of the C-N⁺ ----- F-C charge dipole interaction in fluoro organic chemistry [PDF]
, 2009 Chapter 1 introduces the discovery of elemental fluorine by H. Moissan and some uses of inorganic fluoride. Organo fluoro compounds and their place in pharmaceuticals and agrochemicals are also introduced.
Gooseman, Natalie Elizabeth Jane
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Stereoselectively fluorinated N-heterocycles: a brief survey
Beilstein Journal of Organic Chemistry, 2013 The stereoselective incorporation of fluorine atoms into N-heterocycles can lead to dramatic changes in the molecules’ physical and chemical properties.
Xiang-Guo Hu, Luke Hunter
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Beilstein Journal of Organic Chemistry, 2014 The syntheses of palmitic acids and a nonadecane are reported with CF2 groups located 1,3 or 1,4 to each other along the aliphatic chain. Specifically 8,8,10,10- and 8,8,11,11-tetrafluorohexadecanoic acids (6b and 6c) are prepared as well as the singly ...
Yi Wang +3 more
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Fluorine in silicate glasses: A multinuclear nuclear magnetic resonance study [PDF]
, 1992 Anhydrous nepheline, jadeite, and albite glasses doped with F as well as hydrous F-containing haplogranitic glasses were investigated using 19F combined rotation and multiple-pulse spectroscopy; 19F → 29Si cross-polarization/magic angle spinning (MAS ...
Merwin, Lawrence +5 more
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The preferred conformation of erythro- and threo-1,2-difluorocyclododecanes
Beilstein Journal of Organic Chemistry, 2012 Cyclododecane adopts a square-like structure with corner and edge CH2 groups. In this study erythro- and threo-1,2-difluorocyclododecanes were prepared to explore whether the two vicinal C–F bonds, with different relative configurations, preferably ...
Yi Wang +4 more
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Prins fluorination cyclisations: Preparation of 4-fluoro-pyran and -piperidine heterocycles
Beilstein Journal of Organic Chemistry, 2010 The Prins reaction was investigated using BF3·OEt2 as a Lewis acid. It has been recently demonstrated, that if BF3·OEt2 is used in stoichiometric amounts then these reactions generate fluorinated products where the BF3·OEt2 contributes fluoride ion to ...
Guillaume G. Launay +2 more
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Three step synthesis of single diastereoisomers of the vicinal trifluoro motif
Beilstein Journal of Organic Chemistry, 2009 A three step route to single diastereoisomers of the vicinal trifluoromethyl motif is described. The route starts from either syn- or anti-α,β-epoxy alcohols and takes a direct approach in that each of the three steps introduces a fluorine atom in a ...
Vincent A. Brunet +2 more
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The effect of fluorine on viscosities in the system Na2O-Al2O3-SiO2: implications for phonolites, trachytes and rhyolites [PDF]
, 1985 The effect of fluorine on melt viscosities of five compositions in the system Na2O-Al2O3- SiO2h as been investigateda t one atmospherea nd 1000-1600'Cb y concentric-cylinder viscometry.
Scarfe, Christopher M. +2 more
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Flavin Catalysts in Organic Synthesis
Angewandte Chemie International Edition, EarlyView.Flavins and their congeners are potent catalysts for organic synthesis inspired by enzymatic transformations. In addition to catalysis in the flavin ground state via covalent intermediates, the excited singlet and triplet states unlock applications including photooxidation, photoreduction, and energy transfer via sensitization.
Jan Freudenberg, Golo Storch
wiley +1 more source
All-cis 1,2,3,4,5,6-hexafluorocyclohexane is a facially polarized cyclohexane [PDF]
, 2015 This work was generously supported by the Engineering and Physical Sciences Research Council (EPSRC) and the European Research Council (ERC).The highest-energy stereoisomer of 1,2,3,4,5,6-hexafluorocyclohexane, in which all of the fluorines are ‘up’, is ...
Douglas Philp +9 more
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