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温度

0 °C

To a solution of 2-[3-(2-azidoethyl)-6-fluoro-1H-indol-2-yl]-propanedioic acid dimethyl ester (37 mmol) in dry MeOH (0.25 L) at 0° C. under argon was added a solution of 25% NaOMe in MeOH (8.56 mL, 37.4 mmol). The mixture was stirred for 30 min at 0° C. MeI (3.56 mL, 56.6 mmol) was added. The mixture was refluxed for 42 h, cooled, and concentrated. The residue was partitioned between H2O and Et2O. The Et2O extracts were washed with H2O, dried, and concentrated to an oil. This oil was purified by silica chromatography to give the title compound: TLC Rf=0.50 (CH2Cl2); MS (ESI+) m/z 371.1; 1H NMR (CDCl3, 300 MHz) δ 9.63 (1H), 7.44 (1H), 7.05 (1H), 6.97 (1H), 3.82 (6H), 3.44 (2H), 2.94 (2H), 1.93 (3H).

1. temperatureThe mixture was refluxed for 42 h
2. temperaturecooled
3. concentrationconcentrated
4. customThe residue was partitioned between H2O and Et2O
5. washThe Et2O extracts were washed with H2O
6. customdried
7. concentrationconcentrated to an oil
8. customThis oil was purified by silica chromatography