Trifluoroacetic acid → HCID 178434233, compound

Participants

Reaction Steps

Following the general procedure-1, tert-butyl 5-(4-amino-3,5-difluorophenyl)-3-methyl-1H-indazole-1-carboxylate (106 mg) was prepared from 4-bromo-2,6-difluoroaniline (250 mg, 1.2 mmol) and teRT-butyl 3-methyl-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-indazole-1-carboxylate (559 mg, 1.56 mmol) as a white solid. teRT-butyl 5-(4-amino-3,5-difluorophenyl)-3-methyl-1H-indazole-1-carboxylate (205 mg) was dissolved in dichloromethane (4 ml), trifluoroacetic acid (0.8 ml) was added and stirred at RT for 4 h. The solvent was removed and the residue co-evaporated 4 times with dichloromethane. Solid obtained was dried under high vacuum to obtain the title compound (243 mg) as a white solid. 1H-NMR (δ ppm, DMSO-d6, 400 MHz): 9.01 (bs, 1H), 7.92 (s, 1H), 7.58 (dd, J 1.4, 8.7, 1H), 7.44 (d, J 8.7, 1H), 7.32 (dd, J 2, 8.2, 2H), 5.22 (s, 2H), 2.50 (s, 3H).

Provenance & Evidence