Trifluoroacetic acid → 1-(2-(2-(5-Chloro-2-((4-(piperidin-4-yl)phenyl)amino)pyrimidin-4-yl)ethyl)phenyl)cyclopropanecarboxamide

Participants

Reaction Steps

TFA (1.0 mL) was added to a solution of tert-butyl 4-(4-((4-(2-(1-carbamoylcyclopropyl)phenethyl)-5-chloropyrimidin-2-yl)amino)phenyl)piperidine-1-carboxylate (A15) (121 mg, 210 μmol) in DCM (5 mL) and the resulting mixture was stirred at room temperature for 16 hours. Saturated aqueous Na2CO3 was added until the solution was basic then EtOAc (50 mL) and water (50 mL) were added. The organic layer was separated, washed with brine (20 mL), dried over MgSO4 then the volatiles removed in vacuo. The resulting residue was adsorbed onto silica gel and the resulting material washed with MeOH (300 mL) then 1 M NH3 in MeOH/EtOH (1:1) (300 mL). The volatiles from the ammoniacal washing were removed in vacuo and the resultant gum sonicated in Et2O (20 mL) to give a precipitate that was collected by filtration. Air drying of the filter cake gave the product 7 as a white solid (55 mg, 55%); 1H NMR (400 MHz, CDCl3) δ 8.28 (s, 1H), 7.52-7.46 (d, J=8.6 Hz, 2H), 7.46-7.41 (d, J=7.3 Hz, 1H), 7.37-7.32 (d, J=5.0 Hz, 2H), 7.31-7.25 (m, 2H, obscured), 7.23-7.18 (d, J=8.5 Hz, 2H), 7.15 (s, 1H), 5.33 (s, 2H), 3.34-3.12 (m, 6H), 2.84-2.71 (td, J=12.2, 2.3 Hz, 2H), 2.71-2.56 (tt, J=12.1, 3.7 Hz, 1H), 1.92-1.59 (m, 6H, obscured), 1.15 (s, 2H). LCMS-A: rt 4.527 min; m/z 477 [M+H]+.

Provenance & Evidence