Ueber die Methylmercaptantrisulfonsäure, Methylmercaptandisulfonsäure und Methylalkoholtrisulfonsäure

Methanetrisulfonic Acid: A Highly Efficient Strongly Acidic Catalyst for Wagner-Meerwein Rearrangement, Friedel-Crafts Alkylation and Acylation Reactions. Examples from Vitamin E Synthesis

“…The preparation of tri-potassium methanetrisulfonate and its corresponding free acid 4 had already been reported by Theilkuhl in 1868. After several reports on this chemistry [9][10][11][12][13][14][15][16], an improved procedure developed by Sartori and Jüschke made the tri-potassium salt easily available on a laboratory (deca-gram) scale from cheap acetone and oleum (H 2 SO 4 /SO 3 ) [17]. Purification via the barium salt and subsequent acidification by sulfuric acid is based on the work of Bagnall and further optimization by Backer [12,14].…”

The Chemistry Of Trichloromethanesulfenyl Chloride

“…Isolation of the intermediate thiophosgene demonstrates that the sulfonates are not formed directly from trichloromethanesulfenyl chloride. Thiophosgene, in turn, reacts with the sulfites to form mercaptomethanetrisulfonates (1,5,16). In the absence of a catalyst, trichloromethanesulfenyl chloride absorbs chlorine at room temperature, but when the reaction mixture is heated, most of the absorbed chlorine is liberated.…”