Sulfonic acid amides sulfinic acids

Sulfonic acid amides from sulfinic acids... 

Arylsulfonyl chlorides are pivotal precursors for the preparation of many diverse functional types including sulfonate esters,8 amides,4 sulfones,9 sulfinic acids,10 and others.11 Furthermore, sulfonyl fluorides are best prepared from sulfonyl chlorides.12 The sulfonyl fluorides have many uses, among which is their utilization as active site probes of chymotrypsin and other esterases.13 The trifluoromethyl group also plays valuable roles in medicinal chemistry.14... 

Although perfluorocarbon sulfonic acid groups are very stable chemically as well as thermally, perfluorocarbon sulfonyl halide, especially sulfonyl chloride groups, are quite reactive. For example, sulfonyl chloride groups react with oxidants, reductants, various amines, phenol compounds, iodine compounds, etc. and give carboxylic acid, sulfinic acid, sulfonic acid amide, -CF2I and so forth. Some examples of how this feature can be used to generate various kinds of membranes will next be described... 

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