N-(4-chloropyridin-2-yl)cyclopropanecarboxamide → N-[4-[(6-Chloro-[1,3]dioxolo[4,5-B]pyridin-7-Yl)amino]-2-Pyridyl]cyclopropanecarboxamide

関与物質

反応条件

反応手順

N-(4-chloropyridin-2-yl)cyclopropanecarboxamide (4 g, 20.34 mmol), 6-chloro-[1,3]dioxolo[4,5-b]pyridin-7-amine (3.51 g, 20.34 mmol), (9,9-dimethyl-9H-xanthene-4,5-diyl)bis(diphenylphosphine) (1.412 g, 2.44 mmol), diacetoxypalladium (0.228 g, 1.02 mmol) and cesium carbonate (13.26 g, 40.68 mmol) were suspended in 1,4-dioxane (75 mL) and sealed into 5 microwave tubes. The reaction was heated to 150 °C for 30 minutes in the microwave reactor and cooled to RT. The reaction mixture was diluted with EtOAc (250 mL) and washed with water (250 mL). The organic layer was dried over MgSO4, filtered and evaporated to afford crude product. The crude product was purified by flash silica chromatography, elution gradient 0 to 100% EtOAc in isohexane. Pure fractions were evaporated to dryness to afford and orange gum. The gum was dissolved in a little ether, then isohexane was added to precipitate N-(4-(6-chloro-[1,3]dioxolo[4,5-b]pyridin-7-ylamino)pyridin-2-yl)cyclopropanecarboxamide (2.180 g, 32.2 %) as a white solid.

情報源と証拠