Experimental Crystal data

R factor = 0.038; wR factor = 0.086; data-to-parameter ratio = 17.2. The title molecule, C18H21Cl2NO3S2, contains one chiral carbon center and the absolute sterochemistry has been confirmed as as R. An intramolecular N—H O hydrogen bond occurs and the dihedral angle between the benzene rings is 64.5 (1). In the crystal, the molecules are linked by weak C—H O hydrogen bonds, forming a zigzag chain structure extending along the c-axis direction. Related literature For the use of -amino sulfones as enzyme inhibitors, see