Isopropyl methanesulfonate → HCID 178490704, 화합물

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The product from Example 28A (50 mg, 0.14 mmol) in dioxane (5 mL) was treated with NaH (60%) (7 mg, 0.17 mmol) stirred at rt for 10 min and treated with isopropyl methanesulfonate (78 mg, 0.56 mmol). The reaction was heated at 85° C. for 12 hrs, quenched with H2O, the mixture was extracted with EtOAc (2×). The combined organic layers were dried over MgSO4, filtered and concentrated. The residue was purified by column chromatography using an Analogix® Intelliflash280™ (SiO2, 0-50% Hexane in ethyl acetate) to afford 5.2 mg (9%) of the title compound. 1H NMR (400 MHz, CDCl3) δ ppm 1.22 (d, J=6.14 Hz, 6 H) 1.81 (s, 9 H) 3.75-3.83 (m, 1 H) 4.12 (s, 3 H) 4.92 (s, 2 H) 7.10 (d, J=9.21 Hz, 1 H) 7.63 (dd, J=9.21, 2.76 Hz, 1 H) 8.18 (d, J=2.45 Hz, 1 H) 9.28 (s, 1 H); MS (DCI/NH4+) m/z 397 (M+H)+.

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