Tosyl group

A toluenesulfonyl (shortened tosyl, abbreviated Ts or Tos) group, H3CC6H4SO2, is a univalent organic group that consists of a tolyl group, H3CC6H4, joined to a sulfonyl group, SO2, with the open valence on sulfur. This group is usually derived from the compound tosyl chloride, H3CC6H4SO2Cl (abbreviated TsCl), which forms esters and amides of toluenesulfonic acid, H3CC6H4SO2OH (abbreviated TsOH). The para orientation illustrated (p-toluenesulfonyl) is most common, and by convention tosyl without a prefix refers to the p-toluenesulfonyl group.

Tosyl group

A toluenesulfonyl (shortened tosyl, abbreviated Ts or Tos) group, H3CC6H4SO2, is a univalent organic group that consists of a tolyl group, H3CC6H4, joined to a sulfonyl group, SO2, with the open valence on sulfur. This group is usually derived from the compound tosyl chloride, H3CC6H4SO2Cl (abbreviated TsCl), which forms esters and amides of toluenesulfonic acid, H3CC6H4SO2OH (abbreviated TsOH). The para orientation illustrated (p-toluenesulfonyl) is most common, and by convention tosyl without a prefix refers to the p-toluenesulfonyl group.