Reaction Steps
A solution of Intermediate 131d (44.5 mg, 0.06 mmol) and N-methylhomopiperazine (34.3 mg, 0.300 mmol) in THF (1 mL) was stirred at 60° C. for 20 h in a sealed tube. The mixture was concentrated in vacuo and the residue purified by MDAP (Method 7) to give an off-white solid (22 mg). Prep HPLC (Gemini C18, 20-60% MeCN in water, 0.1% HCO2H, 20 min) and concentration of the desired fractions removed the MeCN. The aqueous was washed with DCM (30 mL), then basified with aq. NaOH solution (1M, 0.5 mL) and extracted with DCM (2×10 mL). The combined organics were passed through a hydrophobic frit, then HCO2H (0.01 mL) added and the mixture concentrated in vacuo to leave the title compound as a clear film that became a solid on standing (10.6 mg, 23%). LCMS (Method 5): Rt 3.19 min, m/z 759.7 [MH+]. 1H NMR (400 MHz, d6-DMSO): 0.91 (3H, d, J=6.3 Hz), 1.28 (9H, s), 1.48-1.55 (2H, m), 1.64-1.74 (4H, m), 1.77-1.96 (4H, m), 2.00-2.16 (2H, m), 2.29 (3H, s), 2.58-2.62 (4H, m), 2.69-2.80 (8H, m), 2.91 (1H, ddd, J=12.4, 9.3, 4.3 Hz), 3.16 (1H, dt, J=11.9, 4.3 Hz), 3.28-3.34 (1H, m), 4.82 (1H, td, J=9.0, 5.7 Hz), 5.52 (1H, t, J=4.3 Hz), 6.33 (1H, s), 7.09 (1H, d, J=8.6 Hz), 7.19 (1H, dd, J=9.8, 2.2 Hz), 7.24-7.42 (8H, m), 7.64 (1H, dd, J=9.8, 0.8 Hz), 7.69 (1H, dd, J=2.2, 0.9 Hz), 8.10 (1H, s), 8.19 (1.4H, s).
