p-Toluene sulfonamide was used to prepare the precursor required for synthesis of ethyl 6-phenyl-1-tosyl-1,2,5,6-tetrahydropyridine-3-carboxylate. It acts as a derivative of ammonia activated to alkylation by alkyl halides is exemplified by the synthesis of N-tosyl-2,3-dihydroisoindole from o-xylylene dibromide. It is a precursor of N-tosyl imines. Hybrid compounds of tacrine and p-toluenesulfonamide are effective inhibitors of acetylcholinesterase (AChE) and butyrylcholinesterase (BChE) with the preferential inhibition of BChE. p-Toluenesulfonamide has been employed as nucleophile during tetrabutylammonium fluoride (TBAF) catalyzed vinyl aziridine opening reaction and as a reagent during selective aziridination of olefins catalyzed by dirhodium (II) caprolactamate.