To a solution of (±)-(7-methyl-4-(((tetrahydro-2H-pyran-2-yl)oxy)methyl)-1-tosyl-1H-indol-5-yl)methanol (Example 52-C) (210 mg, 0.49 mmol), phthalimide (144 mg, 0.98 mmol), and PPh3 (385 mg, 1.47 mmol) in THF (5 mL) was added DIAD (0.29 mL, 1.48 mmol) at 0° C., and then the mixture was stirred at room temperature for 3.5 h. The reaction was then concentrated and partially purified by SiO2 column chromatography (heptane/EtOAc=1/0 to 6/4). A solution of the resulting residue and 4M HCl in dioxane (4 mL) in MeOH (10 mL) was stirred at room temperature for 0.5 h. The reaction mixture was poured into 5% aq. NaHCO3. The basic mixture was extracted with CH2Cl2. The organics extract was washed with H2O and brine, dried over Na2SO4, and then filtered. Concentration of the filtrate gave a residue which was purified by SiO2 column chromatography (heptane/EtOAc=6/4 to 3/7) to give the title compound. 1H NMR (400 MHz, DMSO-d6) δ 7.76-7.95 (m, 5H), 7.59 (d, J=8.34 Hz, 2H), 7.38 (d, J=8.34 Hz, 2H), 7.06 (d, J=4.04 Hz, 1H), 6.90 (s, 1H), 5.08 (t, J=5.31 Hz, 1H), 4.91 (s, 2H), 4.85 (d, J=5.31 Hz, 2H), 2.38 (s, 3H), 2.33 (s, 3H).
