Stereoselective and Divergent Aza-Adenosine and Aza-Guanosine Syntheses from Xylofuranose, the Key Fragments of a STING Cyclic Dinucleotide Agonist
作者:Changxia Yuan、Adrian Ortiz、Zhongmin Xu、Jason Zhu、Michael A. Schmidt、Amanda Rogers、Martin Eastgate
DOI:10.1021/acs.joc.1c00984
日期:2022.2.18
The stereoselective and divergent synthesis of two aza-nucleosides is reported. Starting from xylofuranose 9, aza-adenosine 2 was prepared in 13 steps and 7% overall yield, and aza-guanosine 3 was prepared in 13 steps and 7.8% overall yield. Compared to the original syntheses, some advantages of these new routes are significant yield improvement, overall step-count reduction, an optimized protecting
报道了两种氮杂核苷的立体选择性和发散合成。从木呋喃糖9开始,氮杂腺苷2的制备分 13 步,总产率为 7%,氮杂鸟苷3的制备分 13 步,总产率为 7.8%。与原始合成相比,这些新路线的一些优点是显着提高产量、减少整体步数、优化保护基策略、开发用于含氮碱基掺入的多功能平台以及消除有害试剂(例如苄基异氰酸酯,Et 3 N·HF)。