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In a flask, 59.5 g. (0.31 mole) sodium 4-methoxybenzenesulfinate, 25.4 g. (0.31 mole) sodium acetate and 19.2 g. (0.31 mole) boric acid were dissolved in a mixture of 150 ml. water and 275 ml. isopropyl alcohol. There was then added, with stirring, dropwise, 33.9 g. (31 ml., 0.39 mole) 2-chloroacrylonitrile. The mixture was stirred for some time at room temperature. Water was then added and the mixture stirred for one hour. A precipitate formed, which was filtered, washed with water and ethanol, and dried.

1. additionThere was then added
2. stirringThe mixture was stirred for some time at room temperature
3. stirringthe mixture stirred for one hour
4. customA precipitate formed
5. filtrationwhich was filtered
6. washwashed with water and ethanol
7. customdried