Synthesis of Some New <i>S</i>-Nucleoside Derivatives of 2-Thioxo and (2,4-Dithioxo)-5,6,7,8-Tetrahydrobenzo-Thieno[2,3-<i>d</i>]Pyrimidin-4-(3H)Ones
作者:Laila M. Break、Nadia A. M. M. Shmiss、Mosselhi A. N. Mosselhi
DOI:10.1080/10426500903147159
日期:2010.7.30
Ribosylation of 2-thioxo-5,6,7,8-tetrahydrobenzo thieno[2,3-d]pyrimidin-4(3H)-one 1a and 2,4-dithioxo-5,6,7,8-tetrahydrobenzo thieno[2,3-d]pyrimidine 1b with 1-O-acetyl-2,3,5-tri-O-benzoyl-β-D-ribofuranose 7 afforded the benzoylated S-nucleoside derivatives 3 and 4, respectively. Debenzoylation of 3 and 4 by using methanolic sodium methoxide yielded the corresponding free S-nucleosides 5 and 6, respectively
2-thioxo-5,6,7,8-tetrahydrobenzo thieno[2,3-d]pyrimidin-4(3H)-one 1a 和 2,4-dithioxo-5,6,7,8-四氢苯并噻吩[2,3-d]嘧啶的核糖基化[ 2,3-d]嘧啶 1b 与 1-O-乙酰基-2,3,5-三-O-苯甲酰基-β-D-呋喃核糖 7 分别得到苯甲酰化的 S-核苷衍生物 3 和 4。使用甲醇甲醇钠对 3 和 4 进行脱苯甲酰化,分别产生相应的游离 S-核苷 5 和 6。此外,2-thioxo-5,6,7,8-四氢苯并噻吩并[2,3-d]嘧啶-4(3H)-one 8的钾盐与2,3,4,6-四-O反应-乙酰-α-D-吡喃葡萄糖基溴 9,得到 10。后者通过使用甲醇甲醇钠脱乙酰产生相应的 S-糖苷,2-(2',3',4',6'-四羟基-β -D-glupyranosylthio)-5,6,7,8-四氢苯并噻吩[2