4-Methylmorpholine → (S)-N-ethyl-N-methyl-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 N-methylethanamine (0.025 mL, 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 (18 mg, 17% yield). m.p.=91.9° C. 1H NMR (400 MHz, DMSO-d6) δ ppm 1.09 (t, J=7.07 Hz, 3 H) 1.24 (br. s., 3 H) 1.85-2.04 (m, 3 H) 2.13-2.21 (m, 1 H) 2.43-2.48 (m, 3 H) 2.90 (s, 3 H) 3.14-3.22 (m, 4 H) 3.34-3.43 (m, 3 H) 3.54-3.64 (m, 1 H) 3.95-4.02 (m, 1 H) 6.92 (d, J=8.84 Hz, 2 H) 6.99 (d, J=2.02 Hz, 1 H) 7.25 (d, J=8.59 Hz, 2 H) 7.62 (d, J=1.77 Hz, 1 H) 10.44 (s, 1 H). [M+H] calc'd for C25H32N6O2, 449; found, 449.

Provenance & Evidence