505-13-5Relevant academic research and scientific papers
SYNTHESE DE FLUORO-2 THIOCYANATES
Ellouze, W.,Chaabouni, M. M.,Baklouti, A.
, p. 61 - 66 (1987)
2-Fluorinated thiocyanate compounds have been prepared by action of KSCN on a homologous series of 2-fluorotosylates in ethanol at about 100 deg C.The isomerization giving isothiocyanic derivatives does not take place under these conditions.The analysis o
The influence of electronic perturbations on the Sulfur-Fluorine Gauche Effect Dedicated to Prof. Dr. Antonio Togni on the occasion of his 60th birthday.
Thiehoff, Christian,Schifferer, Lukas,Daniliuc, Constantin G.,Santschi, Nico,Gilmour, Ryan
supporting information, p. 121 - 126 (2016/01/25)
Herein, a solution phase NMR conformer population analysis is employed to probe the effect of remote electronic perturbations on the conformational equilibria of a series of para-substituted β-fluorosulfides (1), sulfoxides (2) and sulfone derivatives (3). Conformations that allow for stabilizing stereoelectronic (σC-H → σ?C-F) and electrostatic (Fδ-...Sδ+) interactions predominate: this is consistent with the Sulfur-Fluorine Gauche Effect. The molar fractions (χ) of the two possible gauche conformers correlate linearly with the electron-withdrawing aptitude of the para-substituent, rendering the system ideally suited for a Hammett-type analysis. Despite the clear influence that the remote para-substituents have on conformer population, this is superseded by the oxidation state on sulfur (II, IV, VI), where an increased preference for the gauche conformer follows the trend: sulfide sulfone sulfoxide. It is envisaged that this proof of concept in controlling conformer population, either by proximal (oxidation state) or remote tuning (para-substituent), will find application in molecular design.
