Synthesis, characterization and biological screening of sulfonamides derived form 2-phenylethylamine

In the present study, a series of N-substituted derivatives of 2-phenylethylamine has been synthesized. The reaction of 2-phenylethylamine (1) with benzene sulfonyl chloride (2) yielded N-(2-phenylethyl) benzenesulfonamide (3), which further on treatment with alkyl/acyl halides (4a-i) in the presence of sodium hydride furnished into N-substituted sulfonamides (5a-i). These derivatives were characterized by IR, (1)H-NMR and EI-MS and then screened against acetyl cholinesterase (AChE), butyryl cholinesterase (BChE) and lipoxygenase enzyme (LOX) and were found to be potent inhibitors of butyryl cholinesterase only.

N-Benzyl-N-(2-meth-oxy-phen-yl)benzene-sulfonamide

In the title mol-ecule, C(20)H(19)NO(3)S, the dihedral angle between the phenyl rings is 48.93 (18)°, and they make dihedral angles of 38.37 (17) and 86.50 (19)° with the benzene ring. A weak intra-molecular C-H⋯O inter-action might stabilize the mol-ecular conformation. In the crystal, weak π-π stacking inter-actions between the benzene rings [centroid-centroid distance = 3.774 (2) Å] may help to establish the packing.