Dimethylcarbamoyl Chloride → Trifluoroacetic acid

Participants

Reaction Steps

A solution of N-(2,2-difluoroethyl)-3-(4-(2,4-difluorophenoxyl)piperidin-1-yl)-5,6,7,8-tetrahydropyrido[3,4-b]pyrazin-2-amine TFA salt (15 mg, 0.028 mmol) in DCM (278 μL) at room temperature was treated with dimethylcarbamic chloride (3.0 mg, 0.028 mmol) and DIPEA (4.9 μL, 0.028 mmol), and the resulting reaction mixture was stirred overnight. The crude reaction mixture was diluted in DMF, filtered through a hydrophilic PTFE 0.45 nm filter (Millipore® Millex-LCR), and purified via HPLC Method A to give the title compound as a TFA salt (7 mg) as a white solid. 1H NMR (400 MHz, methanol-d4) 6 ppm 1.92-2.02 (m, 2H), 2.09-2.18 (m, 2H), 2.81-2.86 (m, 2H), 2.90 (s, 6H), 2.96-3.04 (m, 2H), 3.34-3.42 (m, 2H), 3.54 (t, J=5.9 Hz, 2H), 3.74-3.84 (m, 2H), 4.28 (s, 2H), 4.46 (tt, J=7.7, 3.9 Hz, 1H), 5.90-6.22 (m, 1H), 6.88 (dddd, J=9.1, 8.1, 3.2, 1.9 Hz, 1H), 6.99 (ddd, J=11.4, 8.6, 3.0 Hz, 1H), 7.18 (td, J=9.2, 5.6 Hz, 1H); ESI-MS m/z [M+H]+ 497.4.

Provenance & Evidence