4-Methylmorpholine → (S)-N,N-dimethyl-4-(4-((6-oxo-5,6,6a,7,8,9-hexahydropyrido[3,2-e]pyrrolo[1,2-a]pyrazin-3-yl)methyl)piperazin-1-yl)benzamide

Participants

Reaction Steps

In a 1 dram vial, (S)-4-(4-((6-oxo-5,6,6a,7,8,9-hexahydropyrido[3,2-e]pyrrolo[1,2-a]pyrazin-3-yl)methyl)piperazin-1-yl)benzoic acid (100 mg, 0.245 mmol) was suspended in DMF (Volume: 1.227 mL) then added dimethylamine hydrochloride (24.02 mg, 0.295 mmol), HATU (140 mg, 0.368 mmol) and N-methylmorpholine (0.108 mL, 0.982 mmol). The reaction was stirred at RT overnight. The mixture was purified by prep HPLC-MS (acidic mode, 15-35%). The pH of the combined fractions was adjusted to pH=8-9 and extracted with EtOAc (3×30 ml), washed with brine, dried with MgSO4, filtered and concentrated to dryness. The residue was taken up with water/ACN (1:1), and concentrated in vacuo to provide the title compound as a fluffy white solid (21 mg, 19% yield). m.p.=99.2° C. 1H NMR (400 MHz, DMSO-d6) δ ppm 1.85-2.04 (m, 3H) 2.12-2.21 (m, 1H) 2.43-2.49 (m, 4H) 2.94 (s, 6H) 3.14-3.23 (m, 4H) 3.35-3.43 (m, 3H) 3.54-3.64 (m, 1H) 3.94-4.03 (m, 1H) 6.92 (d, J=9.09 Hz, 2H) 6.99 (d, J=1.77 Hz, 1H) 7.29 (d, J=8.84 Hz, 2H) 7.62 (d, J=1.52 Hz, 1H) 10.44 (s, 1H). [M+H] calc'd for C24H30N6O2, 435. found, 435.

Provenance & Evidence