Treatment of 2-methylene-1,3-dithiane 1-oxide with aryl iodides under palladium catalysis in the presence of potassium carbonate and tetrabutylammonium bromide leads to the Mizoroki–Heck arylation to yield 2-(arylmethylene)-1,3-dithiane 1-oxides in high yields.
A method to prepare 2-(2,2,2-trifluoroethylidene)-1,3-dithiane monoxide has been developed, and its interesting reactivity under Pummerer-like conditions is disclosed. The products are useful synthetic intermediates for the synthesis of alpha-trifluoromethyl ketones.