HCID 12080904, compound → 5-Ethynylisophthalic acid

Participants

Reaction Steps

Dipotassium 5-ethynylisophthalate in an amount of 5 g (0.019 moles) was dissolved into 20 ml of ion-exchanged water and insoluble substances were removed by filtration with a 5C filter paper. To the obtained filtrate, a 5 moles/liter hydrochloric acid was added under stirring until the pH became 1. The formed solid substance was separated by filtration, washed with ion-exchanged water and filtered. The filtration and the washing were repeated twice. The obtained solid substance was dried at 50° C. under a reduced pressure and 3.6 g of 5-ethynylisophthalic acid was obtained (the yield: 99.5%).

Provenance & Evidence