Bis‐Ketol Nucleoside Triesters as Prodrugs of the Antiviral Nucleoside Triphosphate Analogues of 3′‐Deoxythymidine and 3′‐Deoxy‐2′,3′‐didehydrothymidine
作者:Kim C. Calvo、Xiaohong Wang、Gerald F. Koser
DOI:10.1081/ncn-120030723
日期:2004.12.31
Derivatives of 3'-deoxythymidine (ddT) and 3'-deoxy-2',3'-didehydrothymidine (d4T) were prepared in which the 5'-hydroxyl group of the nucleoside was esterified to a bis-ketol phosphate. The resulting phosphate triesters are postulated to be prodrugs of the corresponding 5'-mononucleotides, which are formed intracellularly by the hydrolysis of the two ketol ester groups. The triesters were tested for
Bis-ketol phosphate alkyl triesters: Rate of initial ketol group hydrolysis
作者:K.C Calvo、Roger Moore、Gerald F Koser
DOI:10.1016/0040-4039(95)02402-6
日期:1996.2
tetrahydrofurfuryl phosphate (7) was synthesized by the addition of tetrahydrofurfuryl alcohol to the corresponding bis-ketol hydrogen phosphate (8) using DCC as the condensing agent. The rate of loss of a single ketol group was determined over the pH range 6.9 to 9 and at different temperatures. At pH 7.4 and 37°C compound 7 hydrolyzed with a pseudo-first rate constant of 6.2 × 10−4s−1. This hydrolysis rate is
通过使用DCC作为缩合剂将四氢糠醇添加到相应的双-酮氢磷酸酯(8)中,合成了双-(2-氧代-2-苯基乙基)四氢糠基磷酸酯(7)。在6.9至9的pH范围内和不同温度下,测定了一个单独的酮醇基的损失速率。在pH 7.4和37°C下,化合物7的假一级速率常数为6.2×10 -4 s -1水解。该水解速率比简单的烷基磷酸三酯快10 8倍。水解速率类似于单酮醇二烷基磷酸酯三酯所观察到的速率。