Phosphoric acid diester 2,5-dioxo-4,4-diphenylimidazolidin-1-ylmethyl esters, both of whose ester groups can be selectively cleaved, are obtained by converting 3-(hydroxymethyl)-5,5-diphenylimidazolidine-2,4-dione to an alkylsulfonate or arylsulfonate and reacting this with a phosphoric acid diester whose ester groups can be selectively cleaved from the reaction product. The two ester groups can be selectively cleaved from the phosphoric acid diesters obtained and the resulting product can be converted to 5,5-diphenyl-3-[(phosphonooxy)methyl]imidazolidine-2,4-dione disodium salt. The latter is an anticonvulsive, antiepileptic and antiarrhythmic known under the abbreviated name of sodium fosphenytoin.
磷酸二酯2,5-二氧代-4,4-二苯基
咪唑烷-1-甲酯,其两个酯基可选择性地被裂解,通过将3-(羟甲基)-5,5-二苯基
咪唑烷-2,4-二酮转化为烷
磺酸酯或芳基
磺酸酯,并将其与一个
磷酸二酯反应而获得。从所得的
磷酸二酯中可以选择性地裂解两个酯基,得到的产物可以转化为5,5
-二苯基-3-[(
磷酸酯氧)甲基]
咪唑烷-2,4-二酮二钠盐。后者是一种抗抽搐、抗癫痫和
抗心律失常药物,简称为
磷酸美多嗪
钠。