Hydrochloric Acid → 5-amino-N-[5-(5-amino-3,3-difluoro-azepan-1-yl)-1-methyl-pyrazol-4-yl]-2-(2,6-difluoro-4-methoxy-phenyl)thiazole-4-carboxamide

Participants

Reaction Conditions

Reaction Steps

To a solution of tert-butyl 1-(4-(5-(tert-butoxycabonyl-amino)-2-bromothiazole-4-carboxamido)-1-methyl-1H-pyrazol-5-yl)-6,6-difluoroazepan-4-ylcarbamate (200 mg, 0.31 mmol) in dimethyl ether (3 mL) was added 2,6-difluoro-4-methoxyphenylboronic acid (101 mg, 0.54 mmol), [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II), complex with dichloromethane (50 mg, 0.06 mmol), sodium carbonate (67 mg, 0.63 mmol) and water (1 mL). The mixture was degassed for 5 minutes before being heated in a microwave at 120° C. for 2.5 hour. The mixture was concentrated under reduced pressure and the residue purified via silica gel column chromatography (0-100% EtOAc/isohexane) to give a brown oil. To a solution of this oil in MeOH (10 mL) was added HCl in dioxane (4 M, 10 mL, 40.0 mmol) and the mixture was heated at 40° C. for 3 hr. Purification via preparative HPLC gave 459 as a white solid (10 mg, 6% over two steps). 1H NMR (400 MHz, d6-DMSO) δ 8.82 (s, 1H), 7.54 (s, 1H), 7.43 (s, 2H), 6.99-6.88 (m, 2H), 3.85 (s, 3H), 3.79-3.50 (m, 4H), 3.47-3.33 (m, 1H), 3.29-3.16 (m, 2H), 3.15-3.05 (m, 1H), 2.29-2.09 (m, 2H), 1.90-1.78 (m, 1H), 1.77-1.65 (m, 1H), 1.62 (s, 2H). LCMS (ES+) m/z 514 (M+1)

Provenance & Evidence