Esters of 9-(2-phosphonomethoxyethyl)adenine with substituted aliphatic alcohols were prepared as potential prodrugs. Activation of the phosphonate moiety with dimethylchloromethyleneammonium chloride, generated by reaction of thionyl chloride or triphosgene with dimethylformamide, proved to be the method of choice. The esters were also prepared by alkylation of the phosphonate group with dimethylformamide dialkyl acetals or a mixture of the appropriate alcohol with dimethylformamide dineopentylacetal.
使用取代
脂肪醇制备9-(2-
磷酸甲氧乙基)
腺嘌呤酯类潜在前药。
磷酸酯基团的活化采用二
甲基氯甲基
氨基
氯化物,该
氯化物由
氯化硫酰或三膦生成,与二甲基甲酰胺反应后得到。也可以通过将
磷酸酯基团烷基化为二甲基甲酰胺二烷基
乙酯或适当醇与二甲基甲酰胺二
新戊酯的混合物,来制备
酯类。