In a 4 liter flask provided with stirring means, a bromine funnel and a
thermometer, 17.5% sodium hydroxide solution and aminopropanesulfonic
acid (homotaurine) are added.
After complete dissolution, at a temperature of between 25°-40°C, acetic
anhydride are added so as not to exceed a temperature of between 30°-40°C.
The mixture is then maintained at this temperature by heating for at least 1
h.
The solution is then concentrated in vacuum, the residue is redissolved in 2.5
L of distilled water and the mixture is concentrated again. The residue is then
dissolved in 1.6 L of distilled water, filtered, then concentrated almost
completely. Drying is terminated in an oven in vacuum. A colorless crystalline
powder of 3-acetylaminopropanesulfonate of sodium (sodium Nacetylhomotaurinate)
is obtained.
The 3-acetylaminopropanesulfonic acid may be produced by treatment of 3-
acetylaminopropanesulfonate of sodium with hydrochloric acid.
In practice it is usually used as calcium salt.
