Study on Disulfur-Backboned Nucleic Acids: Part 3. Efficient Synthesis of 3′,5′-Dithio-2′-Deoxyuridine and Deoxycytidine
作者:Peihua Shang、Hua Wang、Changmei Cheng、Hongchao Zheng、Yufen Zhao
DOI:10.1080/15257770802520474
日期:2008.11.13
synthesizing 3',5'-dithio-2'-deoxypyrimidine nucleosides 6 and 13 from normal 2'-deoxynucleosides. 2,3'-Anhydronucleosides 2 and 9 are applied as intermediates in the process to reverse the conformation of 3'-position on sugar rings. The intramolecular rings of 2,3'-anhydrothymidine and uridine are opened by thioacetic acid directly to produce 3'-S-acetyl-3'-thio-2'-deoxynucleosides 3 or 5. To cytidine
描述了用于从正常的2′-脱氧核苷合成3′,5′-二硫代2′-脱氧嘧啶核苷6和13的通用方法。2,3'-脱水核苷2和9在该过程中用作中间体,以逆转糖环上3'-位置的构象。2,3'-脱水胸苷和尿苷的分子内环通过硫代乙酸直接打开,以生成3'-S-乙酰基-3'-硫代-2'-脱氧核苷3或5。对于胞苷,OH(-)离子交换树脂用C 1开环,得到2′-脱氧胞苷10,其中3′-OH为苏糖构象。3'-OH被MsCl活化,然后被硫代乙酸钾取代,形成S,S'-二乙酰基3',5'-二硫代2'-脱氧胞苷12。3',5'中的乙酰基