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Methyldiphenylsulfonium tetrafluoroborate is a Methylene transfer agent. It is also used in alkyl diphenylsulfonium salts in place of trialkyl avoids sulfur-containing by-products arising from the Sommelet-Hauser rearrangement.
Charles L. Perrin. Mechanism of hydrogen exchange in amides. J. Am. Chem. Soc. 1974, 96, (17), 5628-5631.
Theodore Cohen.; Glen Herman.; Toby M. Chapman.; David Kuhn. Laboratory model for the biosynthesis of cyclopropane rings. Copper-catalyzed cyclopropanation of olefins by sulfur ylides. J. Am. Chem. Soc. 1974, 96, (17), 5627-5628.
Methylene transfer agent, compare Trimethylsulfonium iodide, A12639. Use of alkyl diphenylsulfonium salts in place of trialkyl avoids sulfur-containing by-products arising from the Sommelet-Hauser rearrangement: J. Am. Chem. Soc., 86, 918 (1964); 95, 1285 (1973).
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
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.