Synthesis and Antiviral Evaluation of Novel 2,3-Dihydroxypropyl Nucleosides from 2- and 4-Thiouracils
作者:Adel A.-H. Abdel-Rahman、Abd-Allah SH. El-Etrawy、Ahmed E.-S. Abdel-Megied、Ibrahim F. Zeid、El Sayed H. El Ashry
DOI:10.1080/15257770802086898
日期:2008.11.13
chloride (2) afforded 2-[[(2,2-Dimethyl-1,3-dioxolan-4-yl) methyl]thio]pyrimidin-4(1H)-ones 3a-c and 4-[[(2,2-Dimethyl-1,3-dioxolan-4-yl)methyl]thio] pyrimidin-2(1H)-ones 8a,b, respectively. Further alkylation with 2 and/or 2,3-O-isopropylidine-1-O-(4-toluenesulfonyl)-glycerol (4) gave the acyclo N-nucleosides 5a-c and 9a,b whose deprotection afforded 6a-c and 10a,b. 2-(Methylthio)pyrimidin-4(1H)-ones 11a-c
用2,3-O-异亚丙基-2,3-二羟丙基氯(2)对2-硫尿嘧啶1a-c和4-硫尿嘧啶7a,b进行区域选择性烷基化,得到2-[[((2,2-二甲基-1,3-)二氧戊环-4-基)甲基]硫基]嘧啶-4(1H)-基3a-c和4-[[((2,2-二甲基-1,3-二氧戊环-4-基)甲基]硫基]嘧啶-2 (1H)-分别为8a,b。用2和/或2,3-O-异丙基-1--1-O-(4-甲苯磺酰基)-甘油(4)进一步烷基化得到无环N-核苷5a-c和9a,b,它们的脱保护得到6a-c和10a ,b。将2-(甲硫基)嘧啶-4(1H)-酮11a-c和4-(甲硫基)嘧啶-2(1H)-酮14a,b用2和/或4处理得到12a-c和15a,b将它们去保护得到13a-c和16a,b。用两个当量的2处理嘧啶-2,4(1H,3H)-二硫酮17a-c,得到2,4-双[[((2,2-二甲基-1,3-二氧杂戊-4-基)甲基]] [硫代]