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A 5 liter flask fitted with a sealed agitator, a condenser and a thermometer is used. 320 g of methyl 3,5-dichlorosalicylate (1.45 mole), 1,280 ml of methyl-ethyl-ketone and 177 g of propargyl bromide (1.45 mole+3% excess) are placed in it, then 200 g of potassium carbonate (1.45 mole) and 21.5 g of sodium iodide (0.145 mole). A thick pulp is obtained, which becomes fluid when brought to reflux. The reflux is maintained for 8 hours.

1. customA 5 liter flask fitted with a sealed agitator, a condenser
2. customA thick pulp is obtained
3. temperatureto reflux
4. temperatureThe reflux is maintained for 8 hours