Iodine → (2,3-Dihydro-benzo[1,4]dioxin-6-yl)-(4-iodo-pyridin-2-yl)-amine

関与物質

反応条件

反応手順

Isopentyl nitrile (Aldrich Chemical Company) (3.9 mL, 29 mmol) was added to a mixture of N2-(2,3-dihydro-benzo[1,4]dioxin-6-yl)-pyridine-2,4-diamine (Example 2(a), 2.4 g, 9.8 mmol), potassium iodide (Aldrich Chemical Company) (1.6 g, 9.8 mmol), iodine (Aldrich Chemical Company) (1.2 g, 4.9 mmol) and copper (I) iodide (Aldrich Chemical Company) (1.9 g, 9.8 mmol) in 1,2-dimethoxyethane (60 mL). The reaction mixture was heated at 60-65° C. for 1 hr. After cooling to room temperature, the insoluble materials were removed by filtration and the filtrate was diluted with EtOAc, washed with 25% aqueous NH4OH, 5% aqueous sodium bisulfite and then brine. The organic layer was separated, dried over Na2SO4 and concentrated in vacuo. The residue was purified on a Biotage 40 M column (2.5:1 hexane:EtOAc) to give the title compound as an off-white solid. MS (ESI, pos. ion) m/z: 355 (M+1).

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