4-Methylmorpholine → (S)-3-((4-(4-(pyrrolidine-1-carbonyl)phenyl)piperazin-1-yl)methyl)-6a,7,8,9-tetrahydropyrido[3,2-e]pyrrolo[1,2-a]pyrazin-6(5H)-one

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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 pyrrolidine (0.024 mL, 0.295 mmol), HATU (140 mg, 0.368 mmol) and N-methylmorpholine (0.108 mL, 0.982 mmol). The r×n 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 (29 mg, 26% yield). m.p.=121.3° C. 1H NMR (400 MHz, DMSO-d6) δ ppm 1.73-1.87 (m, 4 H) 1.87-2.01 (m, 3 H) 2.14-2.21 (m, 1 H) 2.43-2.49 (m, 4 H) 3.15-3.23 (m, 4 H) 3.35 (br. s., 2 H) 3.37-3.49 (m, 5 H) 3.54-3.65 (m, 1 H) 3.95-4.04 (m, 1 H) 6.91 (d, J=9.09 Hz, 2 H) 6.99 (d, J=2.02 Hz, 1 H) 7.42 (d, J=8.84 Hz, 2 H) 7.62 (d, J=1.77 Hz, 1 H) 10.44 (s, 1 H). [M+H] calc'd for C26H32N6O2, 461; found, 461.

Provenance & Evidence