Trifluoroacetic acid → Trifluoroacetic acid

Participants

Reaction Steps

To tert-butyl(trans)-4-(8-(3-phenylureido)imidazo[1,2-b]pyridazin-6-ylamino)cyclohexylcarbamate (6.3 mg, 0.135 mmol) from 1a in dichloromethane (2 mL) was added TFA (1 mL). After stirring at RT for 2 hours, the reaction solution was concentrated in vacuo. The residue was purified by SCX column (300 mg, eluting with 2M ammonia in methanol) to give the title compound as a TFA salt 3.2 mgs (64%). 1H NMR (500 MHz, MeOH) δ ppm 7.64 (1H, s), 7.47 (2H, m), 7.31 (2H, m), 7.06 (2H, m), 6.71 (2H, m), 3.63 (1H, m), 2.71 (1H, m), 2.15 (2H, m), 1.91 (2H, m), 1.28-1.33 (4H, t). LC/MS, m/e 366.27 (M+1). HPLC Rt, 2.18 min. Waters Sunfire C18 column (4.6×50 mm). 0%-100% B. Solvent B: (90% MeOH, 10% H2O, 0.1% TFA). Solvent A: (10% MeOH, 90% H2O, 0.1% TFA). Gradient, start % B=0, final % B=100, gradient time 4 min, hold at 100% B 1 min, flow rate 4 mL/min.

Provenance & Evidence