Water → 1-(5-Methyl-1,3-dioxan-5-yl)-1-allyloxy-2-(1,2,4-triazol-1-yl)-3-(4-chlorophenyl)-propane

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Reaction Conditions

Reaction Steps

A solution of 23.6 g (0.07 mole) of 1-(5-methyl-1,3-dioxan-5-yl)-2-(1,2,4-triazol-1-yl)-3-(4-chlorophenyl)-propan-1-ol in 100 ml of tetrahydrofuran is added dropwise to a suspension of 2.4 g of sodium hydride in 120 ml of dry tetrahydrofuran. After stirring the mixture for 12 hours at 25° C, a solution of 9.7 g (0.08 mole) of allyl bromide in 20 ml of tetrahydrofuran is added dropwise. The reaction mixture is stirred for 36 hours, 20 ml of water are then added cautiously, and the batch is evaporated down. The residue is taken up in 350 ml of methylene chloride, the solution is washed with three times 100 ml of water, and the organic phase is dried and evaporated down. The residue is mixed with 30 ml of petroleum ether and 10 ml of ether and left to stand overnight at +3° C. The crystalline, colorless precipitate is filtered off, washed with petroleum ether and dried. 22.6 g (87.5%) of 1-(5-methyl-1,3-dioxan-5-yl)-1-allyloxy-2-(1,2,4-triazol-1-yl)-3-(4-chlorophenyl)-propane, of melting point 113°-115° C., are obtained.

Provenance & Evidence