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2,2-Difluorosuccinic acid is used in the preparation of fluorofumaric acid. It is also used in enolate alkylation.
Risley, J. M.; Kastanis, J. P.; Young, A. M. Determination of the second-order 1H NMR parameters for the aromatic protons in 4-fluoroaniline and application to the analysis of the 1H NMR spectra for the aromatic protons in N4-(4'-fluorophenyl)succinamic acid and in N4-(4'-fluorophenyl)-3,3-difluorosuccinamic acid. J. Fluorine Chem. 2011, 132 (4), 269-275.
Hagan, D. O. Organofluorine Chemistry: Synthesis and Conformation of Vicinal Fluoromethylene Motifs. J. Org. Chem. 2012, 77 (8), 3689-3699.
Perrin, C. L.; Karri, P.; Moore, C.; Rheingold, A. L. Hydrogen-Bond Symmetry in Difluoromaleate Monoanion. J. Am. Chem. Soc. 2012, 134 (18), 7766-7772.
McAlpine, I.; Tran-Dubé, M.; Wang, F.: Scales, S.; Matthews, J.; Collins, M. R.; Nair, S. K.; Nguyen, M.; Bian, J.; Alsina, L.M.; Sun, J.; Zhong, J.; Warmus, J. S.; ONeill, B. T. Synthesis of Small 3-Fluoro- and 3,3-Difluoropyrrolidines Using Azomethine Ylide Chemistry. J. Org. Chem. 2015, 80 (14), 7266-7274.
Hazard Statements: H314-H318
Causes severe skin burns and eye damage. Causes serious eye damage.
Precautionary Statements: P260u-P303+P361+P353-P305+P351+P338-P301+P330+P331-P405-P501a
Do not breathe dusts or mists. IF ON SKIN (or hair): Remove/Take off immediately all contaminated clothing. Rinse skin with water/shower. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. IF SWALLOWED: Rinse mouth. Do NOT induce vomiting. Store locked up. Dispose of contents/container in accordance with local/regional/national/international regulations.