Aniline → 3'-Amino-6-chloro-N-[3-(trifluoromethyl)phenyl]biphenyl-3-carboxamide

Participants

Reaction Steps

6-Chloro-3′-nitro-N-[3-(trifluoromethyl)phenyl]biphenyl-3-carboxamide (0.46 g, 0.0011 mol) was dissolved in methanol (40 mL), and palladium hydroxide on carbon (20%; 88 mg; 50% wet; 0.000063 mol) was added. The resulting mixture was hydrogenated at 60 psi and 20° C. for 20 h, at which time LCMS showed near complete conversion to the aniline (accompanied by 3% de-chlorination). The reaction mixture was filtered; and rinsed thoroughly. The filtrate was concentrated in vacuo to give 0.33 g of product. The product was purified by prep HPLC/MS using a 30 mm×100 mm C18 column; 35% CH3CN—H2O (0.1% TFA), 1 min, to 55% at 6 min; 60 mL/min; detector set at m/z 391; retention time, 5.5 min. The resulting mixture was freeze dried to yield 258 mg white solid TFA salt. 1H NMR (DMSO-d6) δ 10.62 (br s, 1H, amide NH); 8.20 (s, 1H); 8.04 (d, 1H); 8.00 (m, 2H); 7.75 (d, 1H); 7.59 (t, 1H); 7.45 (d, 1H); 7.35 (t, 1H); 7.00 (m, 3H).

Provenance & Evidence