Novel bisphosphonate alkylating agent, tetraisopropyl 2-[(mesyloxy)methyl]propane-1,3-diyl}bis(oxymethylene)bisphosphonate 19, was synthesized from diethyl 2,2-bis(hydroxymethyl)malonate. Decarbethoxylation of the diethyl 2,2-dimethyl-1,3-dioxane-5,5-dicarboxylate was followed by chloromethylation of 2-[(benzyloxy)methyl]propane-1,3-diol and Arbuzov reaction with triisopropyl phosphite. Bisphosphonate building block 19 was used in the alkylation of various nucleobases (2-amino-6-chloropurine, adenine, 2-amino-6-(cyclopropyl)aminopurine, cytosine, uracil and 4-methoxy-5-methylpyrimidin-2(1H)-one). N9-Substituted purines and N1-substituted pyrimidines were converted to appropriate free bisphosphonic acids. No antiviral or cytostatic activity was detected.
新型
双膦酸烷基化剂,四异丙基2-[(mesyloxy)methyl]
丙烷-1,3-二基}双(氧甲基)
双膦酸酯19,是由二
乙酯2,2-双(羟甲基)
丙二酸酯合成的。首先对二
乙酯2,2-二甲基-1,3-二氧杂环
戊二酸酯进行去羧乙酰化,然后对2-[(苄氧基)甲基]
丙烷-1,3
-二醇进行
氯甲基化,再进行与三
异丙基磷酸酯的阿布佐夫反应。
双膦酸酯基团19被用于烷基化各种核碱基(
2-氨基-6-氯嘌呤、
腺嘌呤、2-
氨基-6-(环丙基)
氨基
嘌呤、
胞嘧啶、尿
嘧啶和4-甲氧基-5-
甲基嘧啶-2(1H)-酮)。N9-取代
嘌呤和N1-取代
嘧啶被转化为相应的自由
双膦酸。未检测到抗病毒或细胞毒活性。