Methyl iodide → 3-(2-chloropyrimidin-4-yl)-1-methyl-1H-indole

Participants

Reaction Conditions

Reaction Steps

NaH (1.707 g, 42.68 mmol, 40% dispersion in mineral oil) was added in small portions to a cooled (0° C.) mixture of 3-(2-chloropyrimidin-4-yl)-1H-indole (Intermediate 131, 8.168 g, 35.57 mmol) in THF (250 mL). The resulting mixture was stirred at 0° C. for 0.5 h and then CH3I (2.67 mL, 42.68 mmol) was added and the mixture stirred at 0° C. for a further 3 h. The reaction was quenched by the addition of sat. NaHCO3 (25 mL). The mixture was then diluted with EtOAc (100 mL), and the resulting solution was washed with sat. NaHCO3 (50 mL), water (50 mL) and sat. brine (50 mL). The organic solution was then concentrated in vacuo. Purification by FCC, eluting with 0-20% CH3OH in CH2Cl2 gave the title compound (8.35 g, 96%) as a pale yellow solid; 1H NMR: 3.90 (3H, s), 7.30 (2H, pd), 7.54-7.60 (1H, m), 7.82 (1H, d), 8.38-8.44 (1H, m), 8.49 (1H, s), 8.53 (1H, d); m/z: ES+ MH+ 1244.

Provenance & Evidence