Methanedisulfonyl chloride

Methanedisulfonyl fluoride is obtained in 82 % yield by the reaction of methanedisulfonyl chloride with anhydrous zinc(II) fluoride at 100°C for 2 hours.52 Benzene-1,3,5-trisulfonyl fluoride is prepared in 55% yield by treating benzene-1,3,5-trisulfonyl chloride with zinc(II) fluoride in pyridine at room temperature for 30 minutes.53... 

Reaction of methanedisulfonyl chloride (103) with enamines in the presence of triethylamine gave an acyclic product 104 (equation 78)76. The formation of 104 is to be contrasted with the double four-membered ring cycloadduct obtained in the reaction of 103 with ketene diethyl acetal (see Section V.B.2). 

The latter reaction gave a substantially increased jdeld of methanedisulfonyl chloride (39, 61%), although chlorosulfonic acid under these conditions did not yield pure methanedisulfonyl chloride 39, which was instead obtained by warming methanedisulfonic acid 36 with phosphorus pentachloride. However, it is possible that the disulfonyl chloride 39 could have been prepared as the sole product by... 

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