2-Amino-N-methylbenzamide → 2-[(2,5-Dichloro-4-pyridinyl)amino]-N-methylbenzamide

関与物質

反応条件

反応手順

Palladium(II) acetate (0.098 g, 0.44 mmol) was added to 2,5-dichloro-4-iodopyridine (3 g, 10.95 mmol), 2-amino-N-methylbenzamide (1.645 g, 10.95 mmol), Cesium carbonate (7.14 g, 21.91 mmol) and 9,9-Dimethyl-4,5-bis(diphenylphosphino)xanthene (0.380 g, 0.66 mmol) in dioxane (150 mL) under nitrogen. The resulting suspension was stirred at 80 °C for 18 hours. The reaction mixture was filtered and the filtrate was evaporated to dryness. The crude residue was triturated with DCM to give a solid which was collected by filtration and dried under vacuum to give 2-(2,5-dichloropyridin-4-ylamino)-N-methylbenzamide (1.58 g, 49 %) as a tan solid, LCMS indicated 87% pure. This was purified by flash silica chromatography, elution gradient 0 to 5% MeOH in DCM. Pure fractions were evaporated to dryness to afford 2-(2,5-dichloropyridin-4-ylamino)-N-methylbenzamide (1.040 g, 32.1 %) as a yellow solid.

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