Sodium salts of phenylmalonic acid mono-esters are produced by reacting a phenylacetic acid ester with carbon dioxide in the presence of a sodium substituted compound, which is prepared by substituting a sodium atom for a hydrogen atom of an organic compound selected from a group consisting of acetylene, cumene, triphenylmethane, methyl-methylthiomethyl-sulfoxide and dimethyl-sulfoxide, at a temperature in a range of -20.degree. C. to -40.degree. C.
苯丙酸单酯的钠盐是通过在存在
钠取代化合物的情况下,将
苯乙酸酯与
二氧化碳反应而制得的。所述
钠取代化合物是通过将
钠原子取代有机化合物中的氢原子而制备的,所述有机化合物选自
乙炔、
叔丁基苯、三苯
甲烷、甲基-甲
硫基甲基-亚砜和
二甲基亚砜组成的一组,反应温度在-20摄氏度至-40摄氏度范围内。