Potassium Phosphate, Tribasic → Methyl 4-(6-bromoimidazo[1,2-a]pyridin-3-yl)benzoate

関与物質

反応手順

2.3 g methyl 4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzoate prepared according to T. Ishiyama et al., J. Org. Chem., 60, 7508 (1995), 2.0 g 6-bromo-3-iodoimidazo[1,2-a]pyridine (compound in Production Example 49), 2.5 g potassium phosphate, 360 mg tetrakistriphenyl phosphine palladium and 30 mL N,N-dimethylformamide were heated at 100° C. under nitrogen atmosphere. Insolubles were filtered off, the solvent was removed, and the residue was purified by NH silica gel column chromatography (hexane/ethyl acetate) and recrystallized from ethyl acetate to give 1.39 g of the title compound (colorless crystals).

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