Imidazole → ethyl 7-bromo-3-(3-iodopropyl)-1H-indole-2-carboxylate

Participants

Reaction Conditions

Reaction Steps

To a mixture of EXAMPLE 1B (1.116 g) in dichloromethane (30 mL) at 0° C. was added iodine (1.01 g), triphenyl phosphine (1.03 g) and imidazole (0.535 g). The mixture was stirred at 0° C. for 1 hour and treated with saturated NaHCO3 (50 mL). Stirring was continued for 30 minutes, and the organic layer was washed with a saturated aqueous Na2S2O3 (50 mL), water (20 mL), and brine (50 mL) and dried (Na2SO4), filtered and concentrated. The concentrate was purified by column chromatography on silica gel (with 0-20% ethyl acetate in hexanes.

Provenance & Evidence