4-amino-N-(2-methylphenyl)benzenesulfonamide

Conditions: temp:115.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A well-stirred suspension of 4-Amino-N-o-tolyl-benzenesulfonamide 12a (47 mg, 179 mmol) and 2,3-dichloro-1,4-naphthquinone (41 mg, 179 mmol) in 10.0 mL of 95% EtOH/5% water solution mixture was refluxed at 115° C. for three days. The orange precipitate obtained was filtered and washed with hot ethanol (5×5 mL), dried under reduced pressure to afford the title compound (23 mg, 28%). Mp=265-266° C.; 1H NMR (400 MHz, DMSO-d6) δ 9.55 (br s, 1H), 9.45 (br s, 1H), 8.04 (d, J=7.2 Hz, 2H), 7.89-7.80 (m, 2H), 7.49 (d, J=8.4 Hz, 2H), 7.17-7.07 (m, 5H), 6.98-6.96 (m, 1H), 1.97 (s, 3H); ESI-LRMS m/z 453.0 (M+35Cl+H)+, 455.0 (M+37Cl+H)+; ESI-HRMS m/z calculated for C23H8ClN2O4S (M+H)+ 453.0670, found 453.0665. The orange precipitate obtained was filtered washed with hot ethanol (5×5 mL) dried under reduced pressure

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: (RK1-1-45) I This compound was prepared according to the procedure described for compound 12a except using 11k to obtain the required product as a yellow solid (141 mg, 77%). Mp=51-54° C.; 1H NMR (400 MHz, CDCl3) δ 7.44 (d, J=8.4 Hz, 1H), 6.97 (d, J=8.8 Hz, 2H), 6.72 (d, J=8.8 Hz, 2H), 6.61 (br s, 1H), 6.19 (d, J=2.0 Hz, 1H), 6.14 (dd, J=8.6, 2.2 Hz, 1H), 4.06 (br s, 2H), 3.98 (s, 3H), 3.72 (s, 3H). (RK1-1-45) I This compound was prepared

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: (RK2-065-01) I This compound was prepared according to the procedure described for compound 12a except using 11j to obtain the required product as a yellow solid (63 mg, 93%). Mp=189-191° C.; 1H NMR (400 MHz, CD3OD) δ 7.30 (d, J=8.8 Hz, 1H), 7.10-7.06 (m, 2H), 7.01-6.97 (m, 2H), 6.31 (d, J=1.6 Hz, 1H), 6.12 (dd, J=8.8, 2.0 Hz, 1H), 3.30 (s, 3H), 2.22 (s, 3H). (RK2-065-01) I This compound was prepared

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: (RK1-1-42) I This compound was prepared according to the procedure described for compound 12a except using 11i to obtain the required product as a light yellow solid (130 mg, 93%). Mp=158-160° C.; 1H NMR (400 MHz, CDCl3) δ 7.52 (d, J=8.8 Hz, 1H), 6.98 (d, J=8.2 Hz, 2H), 6.93 (d, J=8.2 Hz, 2H) 6.70 (br s, 1H), 6.16 (s, 1H), 6.14 (app d, J=2.0 Hz, 1H), 4.05 (br s, 2H), 3.95 (s, 3H), 2.23 (s, 3H). (RK1-1-42) I This compound was prepared

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: (RK1-1-39) I This compound was prepared according to the procedure described for compound 12a except using 11h to obtain the required product as an orange-brown solid in (169 mg, 66%). Mp: not determined; 1H NMR (400 MHz, CDCl3) δ 7.50 (d, J=8.4 Hz, 1H), 6.99 (t, J=7.8 Hz, 1H), 6.82 (br s, 1H), 6.79-6.73 (m, 2H), 6.65 (br s, 1H), 6.11 (d, J=2.0 Hz, 1H), 6.09 (s, 1H), 3.99 (br s, 2H), 3.86 (s, 3H), 2.18 (s, 3H). (RK1-1-39) I This compound was prepared

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: (RK1-1-27E II) I This compound was prepared according to the procedure described for compound 12a except using 11g to obtain the required product as a light yellow solid, (197 mg, 79%). Mp: not determined; 1H NMR. (400 MHz, CDCl3) δ 7.45 (d, J=9.0 Hz, 2H), 6.96 (d, J=8.8 Hz, 2H), 6.76 (d, J=9.0 Hz, 2H), 6.58 (d, J=8.8 Hz, 2H), 6.09 (br s, 1H), 4.07 (br s, 2H), 3.76 (s, 3H).

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: (RK1-1-27C II) I This compound was prepared according to the procedure described for compound 12a except using 11e to obtain required the product as a white solid (85 mg, 57%). Mp not determined; 1H NMR (400 MHz, CDCl3) δ 7.47 (d, J=8.6 Hz, 2H), 7.42 (dd, J=7.8, 1.1 Hz, 1H), 7.19 (br s, 1H), 6.96-6.89 (m, 2H), 6.81 (td, J=7.8, 1.1 Hz, 1H), 6.67 (dd, J=8.2, 1.1 Hz, 1H), 6.49 (d, J=8.6 Hz, 2H), 3.60 (s, 3H). to obtain

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: (RK1-1-30)I This compound was prepared according to the procedure for compound 12a except using 11d to obtain the required product as an off-white solid (225 mg, 99%). Mp=174-176° C. (lit 190-190.5° C., Bioorganic and Medicinal Chemistry 15(2), 1014-1021; 2007); 1H NMR (400 MHz, CDCl3) δ 7.43 (d, J=8.8 Hz, 2H), 6.96 (d, J=8.4 Hz, 2H), 6.86 (d, J=8.4 Hz, 2H), 6.52 (d, J=8.8 Hz, 2H), 6.14 (br s, 1H), 4.00 (br s, 2H), 2.20 (s, 3H). (RK1-1-30)I This compound was prepared

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 4-Amino-N-o-tolyl-benzenesulfonamide (12a) (RK1-1-24) I To a solution of 4-Nitro-N-o-tolyl-benzenesulfonamide (11a) in 4.0 mL of a 1:1 MeOH/THF mixture, was added nickel chloride hexahydrate (163 mg, 0.68 mmol) at 0° C. under constant stirring. Sodium borohydrate (52 mg, 1.37 mmol) was added portion wise and the progress of the reaction monitored by TLC (60% hexanes/40% ethylacetate). The solvent was removed in vacuo and the remaining black solid was re-suspended in EtOAc and filtered using a pad of celite and washed with EtOAc until the filtrate, when visualized under UV light, showed no product. The solvent was removed under vacuum affording the title compound as an off-white solid (0.045 g, 100%). 1H NMR (400 MHz, CDCl3) δ 7.41 (d, J=8.8 Hz, 2H), 7.24 (d, J=8.0 Hz, 1H), 7.05 (td, J=2.0, 2.4, 2.4 Hz, 1H), 7.01-6.95 (m, 2H), 6.50 (d, J=8.8 Hz, 2H), 6.35 (br s, 1H), 4.05 (br s, 2H), 1.95 (s, 3H). The solvent was removed in vacuo filtered washed with EtOAc until the filtrate, when The solvent was removed under vacuum