5.In this paper, three alkyl substituted dimethyl phosphonates have been synthesized by trimethyl phosphite with 1-Bromopentane, 1-Bromohexane and 1,2-Dibromoethane.

• 摘要以溴戊烷、溴己烷、1,2-二溴乙烷和亚磷酸三甲酯为原料，分别合成了戊基、己基、溴乙基取代的三种膦酸二甲酯化合物。