Tosylation and dansylation of tyrosine residues of proteins with 1-arylsulphonyl-4-dimethylaminopyridinium salts
Abstract
1-Tosyl- and 1-dansyl-4-dimethylaminopyridinium chlorides are easily prepared and may react selectively with tyrosine residues of proteins in aqueous media, leading to stable O-arylsulphonates.