Potassium Iodide → 6-chloro-2-[2-(2-methyl-2,3-dihydroindol-1-yl)-2-oxoethyl]-5H-pyrimidin-4-one

Participants

Reaction Conditions

Reaction Steps

In a reactor suitable for microwave irradiation, 1.3 g of 2-(4-chloro-6-methoxypyrimidin-2-yl)-1-(2-methyl-2,3-dihydroindol-1-yl)ethanone are placed in 20 ml of acetonitrile, 2 g of potassium iodide and 1.7 ml of trimethylchlorosilane. The heterogeneous solution is stirred while microwave-heating at 100° C. for 90 minutes. The resulting product is taken up in 25 ml of water, extraction is carried out with ethyl acetate, washing is carried out with 25 ml of saturated NaCl solution, drying is carried out over MgSO4, filtration is carried out through a VF filter and the resulting product is concentrated under vacuum. The compound obtained is chromatographed on silica gel (40-63 μm), elution being carried out with a mixture of dichloromethane and methanol (90/10, v/v). The fractions containing the expected compound are combined and evaporated. The compound obtained is triturated from a mixture of ethyl acetate and diisopropyl ether, filtered and dried at ambient temperature (20° C.). 6-Chloro-2-[2-(2-methyl-2,3-dihydroindol-1-yl)-2-oxoethyl]-5H-pyrimidin-4-one is isolated in the form of a beige solid (2.2 g), yield 89%.

Provenance & Evidence