Methyl chlorothiolformate

Caution Methyl chlorothiolformate has an obnoxious odor. All operations should be conducted in a well-ventilated hood. 

The methyl chlorothiolformate, b.p. 110-111°, was used as supplied by the Stauffer Chemical Company. 

Method I is easily adapted to larger-scale operation and provides a product which crystallizes readily. Method II provides a product which is difficult to crystallize however, the procedure obviates the use of methyl chlorothiolformate and affords higher yields of product. 

Butyl S-methylthiolcarbonate has been prepared from sodium /-butoxide, carbonyl sulfide, and methyl iodide 1 and from methyl chlorothiolformate and /-butyl alcohol.4 /-Butyl phenyl carbonate has been prepared from phenyl chloroformate and /-butyl alcohol.6 6... 

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