Reaction Steps
A solution of Intermediate 81d (26 mg, 0.07 mmol) in 1,4-dioxane (2 mL) was treated with Intermediate 150c (30 mg, 0.07 mmol) and DIPEA (24 μL, 0.13 mmol) and the mixture was stirred at 70° C. for 18 h. After cooling to RT the mixture was concentrated in vacuo. The residue was purified by FCC, using 0-20% MeOH in DCM, then by prep HPLC (C18 column, 10-98% MeCN in H2O, 0.1% HCO2H) over 20 mins. Concentration of the fractions in vacuo gave pale yellow glass. Trituration with Et2O gave the title compound as an off white solid (20 mg, 40%). LCMS (Method 5): Rt 3.70 min, m/z 719.6 [MH+]. NMR (400 MHz, d6-DMSO): 0.91 (3H, d, J=6.4 Hz), 1.27 (9H, s), 1.47-1.53 (2H, m), 1.64-1.71 (2H, m), 1.77-1.97 (4H, m), 2.00-2.15 (2H, m), 2.16 (3H, s), 2.39 (2H, t, J=7.2 Hz), 2.87-2.92 (1H, m), 2.93 (3H, s), 3.13-3.21 (4H, m), 3.35-3.46 (4H, m), 4.80-4.87 (1H, m), 5.52 (1H, t, J=4.3 Hz), 6.32 (1H, s), 6.68-6.72 (3H, m), 7.13 (1H, d, J=8.6 Hz), 7.19 (1H, dd, J=9.7, 2.2 Hz), 7.24-7.38 (5H, m), 7.64 (1H, d, J=9.7 Hz), 7.69 (1H, m), 8.11 (1H, s).
