Sulfur catalysts thiocarbonylation

Thiocarbonyl compounds can be converted into difluoromethylene compounds usually under milder conditions than the conesponding carbonyl compounds Ethylene trithiocarbonate reacts smoothly with sulfur tetrafluoride at 110 °C in the absence of catalyst to give 2,2-difluoro-l,3-dithiolane in high yield. Thiuramsul/ides under similar conditions are readily converted into dialkyItrifluo-rometkylamines [11] (equations 13 and 14). 

Oxidation i/ thiocarbonyl compoands. Thiocarbonyl compounds are oxidized to carbonyl compounds by DMSO in the presence of acid catalysts (sulfuric acid. 

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