Hydrochloric Acid → tert-Butyl 4-(4-((4-(2-(1-carbamoylcyclopropyl)phenethyl)-5-(trifluoromethyl)pyrimidin-2-yl)amino)phenyl)piperidine-1-carboxylate

Participants

Reaction Conditions

Reaction Steps

HOBt (99 mg, 0.73 mmol), EDCl.HCl (140 mg, 0.73 mmol) and DIPEA (0.42 mL, 2.43 mmol) were added to a stirred solution of 1-(2-(2-(2-((4-(1-(tert-butoxycarbonyl)piperidin-4-yl)phenyl)amino)-5-(trifluoromethyl)pyrimidin-4-yl)ethyl)phenyl)cyclopropanecarboxylic acid (A5) (297 mg, 0.486 mmol) in dry THF (6 mL) and dry DMF (1 mL) under an atmosphere of nitrogen. After 10 minutes ammonium carbonate (234 mg, 2.43 mmol) was added in one portion and the resulting solution was stirred at 40° C. for 72 hours. The volatiles were removed in vacuo and EtOAc (50 mL) and saturated NaHCO3 (50 mL) were added to the residue. After separating the organic layer, the aqueous phase was extracted with EtOAc (2×50 mL). The organic extracts were combined, washed with brine and dried over MgSO4. The volatiles were removed under reduced pressure and the residue was purified by silica gel column chromatography (Biotage Isolera, SiO2 cartridge, 0-60% EtOAc in petroleum benzine 40-60° C.) to give the title compound A6 as a yellow solid (131 mg, 44%); 1H NMR (400 MHz, d6-DMSO) δ 10.15 (s, 1H), 8.67 (s, 1H), 7.67 (d, J=8.5 Hz, 2H), 7.32 (dd, J=13.9, 5.0 Hz, 3H), 7.26-7.14 (m, 3H), 6.98 (s, 1H), 5.99 (s, 1H), 4.05 (dd, J=15.7, 8.8 Hz, 2H), 3.13 (dd, J=25.3, 9.9 Hz, 4H), 2.93-2.70 (m, 2H), 2.63 (t, J=12.2 Hz, 1H), 1.74 (d, J=12.5 Hz, 2H), 1.41 (s, 13H), 0.97 (s, 2H). LCMS-A: rt 6.720 min; m/z 610 [M+H]+.

Provenance & Evidence