Trifluoroacetic acid → 4-Amino-2-fluoro-N-thiazol-2-yl-benzenesulfonamide

Participants

Reaction Steps

Trifluoroacetic acid (8 mL, 0.1 mol) was added to the mixture of the [A] 4-(2,4-dimethoxy-benzylamino)-2-fluoro-N-thiazol-2-yl-benzenesulfonamide (2.59 g, 0.00612 mol) in methylene chloride (33 mL). The reaction mixture was stirred for one hour (turned into a purple solution) then concentrated to give the crude product, which was purified using Gilson preparative HPLC (reverse phase, Phenomenex 250×30 mm, 15 micron C18 column, 40 mL/min. Gradient, 85% A to 100% B over 25 min. Solvent A: 7800 water/200 acetonitrile/8 TFA. Solvent B: 7200 acetonitrile/800 water/8) to give the product as a yellow solid (0.92 g, 55%).

Provenance & Evidence