(1)Eight dialkylphosphites(Ⅰ), including, dimethyl-, diethyl-, di-n-propyl-, di-iso-propyl-, di-n-butyl-, di-iso-butyl-, di-sec-butyl-, and di-n-amyl- phosphite, reacted with aniline in the presence of carbon tetrachloride and a tertiary base to form the corresponding dialkylanilinophosphonates(Ⅱ).It was found that the reaction became increasingly difficult for the dialkylphosphites in the following order:dimethyl-, diethyl-, di-n-propyl-, di-n-butyl-, di-n-amyl-, di-iso-butyl-, di-iso-propyl-, and di-sec-butylphosphite.