Potassium Hydroxide → 5-Chloro-2-[2-(6-chloro-2-pyridyl)propen-3-yl]-2-methylindan 1,3-dion

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Reaction Steps

In 20 ml of methanol was dissolved 1.32 g of 85% potassium hydroxide, and then 3.89 g of 5-chloro-2-methylindan-1,3-dione, 3.76 g of 6-chloro-2-(1-chloromethylvinyl)pyridine and 0.05 g of potassium iodide were added to the solution. After refluxing under heating for 3 hours, the solvent was evaporated and water was poured. The reaction mixture was extracted with ethyl acetate, the organic layer was washed with water and with a saturated saline solution, and then dried over anhydrous magnesium sulfate. After the solvent was evaporated, the residue was separated and purified by silica gel column chromatography (developing solvent: n-hexane/ethyl acetate=5/1) to obtain 6.02 g of the compound No. 115 shown in Table 1.

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