Carbonyl sulphide, hydrolysis

The carbonyl sulphide is produced, together with ammonia, by hydrolysis of the thiocyanie acid, which hydrolysis, according to Klason,3 is preceded by the formation of thiolcarbamic acid, thus ... 

Sulphur in the coal contaminates the synthesis gas as hydrogen sulphide, this is also removed in the acid gas plant. Carbonyl sulphide (COS) can also be present and this is reduced to acceptable levels by hydrolysis with steam in a unit prior to the acid-gas plant by the reaction ... 

Dye-sensitized photo-oxygenation of NN-dimethylhydrazones followed by reduction with triphenylphosphine or dimethyl sulphide and hydrolysis yields the parent carbonyl compounds in fair to good yield. 

Vinyl azides, which can be obtained from olefins, are converted in high yield into the corresponding carbonyl compounds by sodium sulphide in methanol." The mercury(ii)-catalysed hydrolysis of the vinyl chloride (32) shows an interesting solvent dependence in dichloromethane, acetic acid, benzene, or acetonitrile the yield of (33) is almost quantitative and no trace of (34) is observed, whereas in methanol 83% (34) and 6% (33) are obtained [equation (7)]." ... 

Diethyl methylthiomethylphosphonate can be alkylated by successive treatment with n-butyl-lithium and an alkyl iodide the lithio-derivatives of such alkylated esters react with carbonyl compounds to give /S-alkoxyphosphonate adducts. These products decompose readily to vinyl methyl sulphides, which undergo mercury(ii)-promoted hydrolysis to the corresponding ketone. These transformations are outlined in Scheme 53. 

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