Dimethylcarbamoyl Chloride → Trifluoroacetic acid

Participants

Reaction Steps

Dimethylcarbamic chloride (6.4 mg, 0.059 mmol) was added to a solution of 3-(4-(2,4-difluorophenoxyl)piperidin-1-yl)-N-isopropyl-5,6,7,8-tetrahydropyrido[3,4-b]pyrazin-2-amine TFA salt (15.3 mg, 0.030 mmol) and triethylamine (12 μL, 0.089 mmol) in DCM (300 μL) at rt. After 1 h, the mixture was purified by HPLC Method A to give the title compound as a TFA salt (11.1 mg, 63.8%) as a yellow film. 1H NMR (400 MHz, methanol-d4) δ ppm 1.31 (d, J=6.3 Hz, 6H), 1.91-2.01 (m, 2H), 2.09-2.18 (m, 2H), 2.86 (t, J=5.7 Hz, 2H), 2.90 (s, 6H), 3.03-3.11 (m, 2H), 3.39-3.47 (m, 2H), 3.55 (t, J=5.7 Hz, 2H), 4.14 (quin, J=6.4 Hz, 1H), 4.27 (s, 2H), 4.49 (tt, J=7.3, 3.6 Hz, 1H), 6.84-6.91 (m, 1H), 6.99 (ddd, J=11.2, 8.5, 3.0 Hz, 1H), 7.18 (td, J=9.2, 5.6 Hz, 1H); ESI-MS m/z [M+H]+ 475.4.

Provenance & Evidence