Sodium Hydroxide → 4-But-2-ynyloxy-benzenesulfonic acid sodium salt

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Reaction Steps

To a solution of 4-hydroxybenzenesulfonate sodium salt (52.35 g, 0.225) in 1 L of isopropanol and 225 mL of a 1.0N solution of sodium hydroxide was added 59.96 g (0.45 mol) of 1 bromo-2-butyne. The resulting mixture was heated to 70° for 15 h and then the isopropanol was removed by evaporation in vacuo. The resulting white precipitate was collected by filtration, washed with isopropanol and ether and dried in vacuo to give 45.08 g (81%) of the desired product as a white solid.

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