Sodium Carbonate → HCID 67286071, compound

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Reaction Steps

Next, into a recovery flask equipped with a reflux pipe were put 3.9 g of 4-chloro-6-(naphthalen-2-yl)pyrimidine obtained in Step 1, 2.8 g of 2-naphthaleneboronic acid, 1.7 g of sodium carbonate, 0.14 g of bis(triphenylphosphine)palladium (II) dichloride (abbreviation: Pd(PPh3)2Cl2), 20 mL of water, and 20 mL of acetonitrile, and the air in the flask was replaced with argon. This reaction container was heated by irradiation with microwaves (2.45 GHz, 100 W) for 60 minutes. Here, into the flask were further put 1.4 g of 2-naphthaleneboronic acid, 0.9 g of sodium carbonate, 0.070 g of Pd(PPh3)2Cl2, 5 mL of water, and 5 mL of acetonitrile, and the mixture was heated again by irradiation with microwaves (2.45 GHz, 100 W) for 60 minutes. After that, water was added to this solution and an organic layer was extracted with dichloromethane. The obtained organic layer was washed with water and dried with magnesium sulfate. The solution after drying was filtered. The solvent of this solution was distilled off, and then the obtained residue was purified by flash column chromatography using hexane and ethyl acetate as a developing solvent in a ratio of 5:1, so that a pyrimidine derivative Hd2npm, which was the objective substance, was obtained (yellow white powder, yield of 19%). A synthesis scheme (h-2) of Step 2 is shown below.

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