Sodium hydride → 4-Cyano-6-(2,4-difluorobenzyloxy)-2-(1-methyl-3-trifluoromethylpyrazol-5-yloxy)pyridine

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Reaction Conditions

Reaction Steps

Sodium hydride (0.1 g, 60%, 2.5 mmol) is added to a solution of 2,4-difluorobenzyl alcohol (0.28 ml, 2.5 mmol) in sulfolane (5 ml) at 50° C. After 1 hour at 50° C., 4-cyano-2,6-bis(1-methyl-3-trifluoromethylpyrazol-5-yloxy)pyridine (1 g, 2.3 mmol) (from Example 2) is added to the reaction mixture. The mixture is heated to 90° C. overnight. After cooling, the reaction mixture is diluted with pentane/ethyl acetate (by volume ration 1/1) and filtered through a bed of silica gel. The filtrate is washed 6 times with water. The organic layer is dried with anhydrous magnesium sulfate, filtered and evaporated in vacuo. Purification by flash chromatography (silica gel: pentane/ethyl acetate 8/2 v/v) and washing of the product with diisopropyl ether yields the title compound (0.2 g, 21% yield) of melting point 109° C.

Provenance & Evidence