Regioselective synthesis of 5′-amino acid esters of some nucleosides via orthogonal protecting protocol
作者:Jia-An Liu、Xiao-Peng Guo、Shuang Liang、Fei An、Hong-Yan Shen、You-Jun Xu
DOI:10.1016/j.tet.2015.01.023
日期:2015.3
peptidomimetic prodrugs, which could be actively transported by the intestinal oligopeptide transporters 1 (PepT1), bear improved oral bioavailability. We established here a regioselective synthesis of the 5′-esters of some nucleosides via an orthogonal protecting protocol with triphenylmethyl (Tr) and allyloxycarbonyl (AOC) protecting groups. A series of 5′-esters of cytarabine and gemcitabine were selectively
可以通过肠寡肽转运蛋白1(PepT1)主动转运的拟肽前药5'-位的核苷氨基酸酯具有改善的口服生物利用度。我们在这里通过具有三苯甲基(Tr)和烯丙氧羰基(AOC)保护基团的正交保护方案,确定了一些核苷的5'-酯的区域选择性合成。选择性合成了一系列阿糖胞苷和吉西他滨的5'-酯,总收率超过36.0%。这种有效而稳健的方法将为进一步研究大量抗病毒和抗癌核苷的前药提供例证。