Methanesulfonyl 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 (17 mg, 0.032 mmol), DIPEA (12.2 mg, 0.095 mmol) and methanesulfonyl chloride (4.9 μL, 0.063 mmol) in DCM (315 μL) was stirred at room temperature overnight. The crude reaction mixture was diluted in DMF, filtered through a hydrophilic PTFE 0.45 μm filter (Millipore® Millex-LCR), and purified via HPLC Method A to give the title compound as a TFA salt (6 mg) as a clear oil. 1H NMR (400 MHz, methanol-d4) δ ppm 1.92-2.02 (m, 2H), 2.09-2.18 (m, 2H), 2.88 (t, J=5.9 Hz, 2H), 2.93 (s, 3H), 3.00 (ddd, J=12.4, 8.8, 3.3 Hz, 2H), 3.34-3.42 (m, 2H), 3.57 (t, J=5.9 Hz, 2H), 3.78 (td, J=14.5, 4.3 Hz, 2H), 4.28 (s, 2H), 4.46 (tt, J=7.5, 3.6 Hz, 1H), 5.89-6.22 (m, 1H), 6.84-6.91 (m, 1H), 6.98 (ddd, J=11.4, 8.6, 3.0 Hz, 1H), 7.17 (td, J=9.2, 5.6 Hz, 1H); ESI-MS m/z [M+H]+ 504.3.

Provenance & Evidence