Synthesis and Crystal Structures of o-[(Phenyl/p-methoxyphenyl)carbamoyl]benzene Sulfonamides

o-[(Phenyl/p-methoxyphenyl)carbamoyl]benzene sulfonamides were synthesized in a straightforward manner utilizing directly saccharin and aniline/p-anisidine as starting material and their crystal structures have been determined. (C13H12N2O3S): Mr = 276.31, monoclinic, P21/c, a = 10.277(6), b = 7.501(2), c = 16.261(10) A, β = 96.37(2)°, V = 1,245.8(11) A3, Z = 4. (C14 H14 N2 O4 S): Mr = 306.33, monoclinic, P21/c, a = 10.381(5), b = 7.861(2), c = 16.837(9) A, β = 93.43(2)°, V = 1,371.5(10) A3, Z = 4. In both structures the phenyl rings are inclined at 47.09(7) and 39.88(5)° with respect to each other and the structures are characterized by extensive inter and intramolecular hydrogen bonds. The synthesis and crystal structures of two novel [(aryl)carbamoyl]benzene sulfonamide derivatives have been presented.