Synthesis of Novel Acyclonucleosides Analogs of Pyridothienopyrimidine as Antiviral Agents
作者:Farag A. El-Essawy
DOI:10.1081/ncn-200067425
日期:2005.7.1
Nucleoside analogs of pyridothienopyramidines were prepared by condensing the sodium salt 2a,b with an acyclic side chain in the form of acetylated haloalkoxyalcohol, and subsequent removal of the protecting acetyl group in ammonia/methanol afforded 4a,b. The O-tosyl derivative of 4a could then be modified to azido- and amino derivatives. Reaction of the sodium salt of 2b with halo-ether, benzyl halo-ether
吡啶并噻吩并嘧啶的核苷类似物通过使钠盐 2a,b 与乙酰化卤代烷氧基醇形式的无环侧链缩合,然后在氨/甲醇中除去保护性乙酰基团得到 4a,b 来制备。然后可以将 4a 的 O-甲苯磺酰基衍生物修饰为叠氮基和氨基衍生物。2b的钠盐与卤代醚、苄基卤代醚和/或卤代硫醚的反应分别得到N-和S-烷基化产物8和9。10 与 2a、b 的钠盐偶联得到相应的二氧戊环衍生物 11、13 和 14,在室温下用 80% 的乙酸处理它们,得到二醇 12、15 和 16。 用甲苯磺酰氯处理 16得到二甲苯磺酸酯 17,然后可以将其修饰为二叠氮基和二氨基衍生物。