Sodium hydride → 4-[2-(4-Diphenylmethylpiperazino)ethoxy]-2-(4-methoxyphenyl)-6-methylpyrimidine

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Reaction Steps

0.6 g of 4-chloro-2-(4-methoxyphenyl)-6-methylpyrimidine and 0.76 g of 1-diphenylmethyl-4-(2-hydroxyethyl)piperazine were dissolved in 20 ml of dried tetrahydrofuran. After addition of 0.1 g of 60% sodium hydride, the mixture was stirred for 20 hours at room temperature. The reaction mixture was poured into ice-water and was extracted with ethyl acetate. After the extract was washed with water and was dried with anhydrous magnesium sulfate, then was evaporated in vacuo. The resulting residue was purified with column chromatography with silica gel (Wako gel C-200, elution with chloroform and then chloroform:ethyl acetate=8:1). The desired fraction was crystallized by evaporating the solvent under reduced pressure. The crystals were recrystallized with the solvent mixed with chloroform and ether, resulting to obtain 0.6 g of crystals. Melting point is 132° to 133° C.

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