Synthetic Approaches for the Preparation of Phosphoramidate Prodrugs of 2′-Deoxypseudoisocytidine
作者:Michaela Serpi、Roberto De Biasi、Fabrizio Pertusati、Magdalena Slusarczyk、Christopher McGuigan
DOI:10.1002/open.201700019
日期:2017.6
A synthetic procedure for the preparation of phosphoramidate prodrugs of C‐nucleosides is reported. Different phosphorochloridates were reacted with 3′‐O‐protected N‐acetyl‐2′‐deoxypseudoisocytidine or 3′‐O‐protected 2′‐deoxypseudoisocytidine, followed by acidic hydrolysis of the protecting group. In the presence of the N‐acetyl moiety, the enolisable keto group of the nucleobase was able to react
报道了制备C-核苷氨基磷酸酯前药的合成方法。将不同的磷酰氯与3' - O-保护的N-乙酰基-2'-脱氧伪异胞苷或3' - O-保护的2'-脱氧伪异胞苷反应,然后将保护基进行酸性水解。在存在N-乙酰基部分的情况下,核碱基的可酮基能够与磷酰氯反应(如5'-OH),生成双磷酸化衍生物。如果核碱基的氨基未受保护,则发生差向异构化(β到α)。这些副反应证明了C的独特行为核苷与其核苷类似物的比较。已经证明,这种新型前药的第一个酶促活化步骤可以由羧肽酶介导,并且它遵循更常规的核苷类似物的ProTides报道的相同途径和速率。这些新的氨基磷酸酯衍生物作为抗癌药的治疗潜力值得进一步研究。