反应详情

94 g (1 mol) of ethylphosphonous acid (produced as in Example 1) and 67 g (1 mol) of methacrylonitrile are initially charged in 200 ml of glacial acetic acid in a four-neck round-bottom flask equipped with stirrer, reflux condenser, thermometer and nitrogen inlet and heated. At about 100° C., 98.4 g of a 5% solution of AIBN in glacial acetic acid are added dropwise over 1 h. Thereafter, the solvent was distilled off in vacuo to leave 117 g (80% of theory) of ethyl(2-cyano-2-methylethyl)phosphinic acid.

1. customequipped with stirrer
2. temperaturereflux condenser
3. temperaturethermometer and nitrogen inlet and heated
4. distillationThereafter, the solvent was distilled off in vacuo