A Novel Route to Pyrimidine Nucleosides via Intramolecular Couplings of Bases with 2′-Deoxyribosides: Quick and Stereospecific...but with a 'Twist'
作者:Bruce H. Lipshutz、Hiroyuki Hayakawa、Kaneyoshi Kato、Richard F. Lowe、Kirk L. Stevens
DOI:10.1055/s-1994-25717
日期:——
Coupling of a pyrimidine base (e.g., thymine) with the C-5′ hydroxyl group of a 2′-deoxyriboside via bromoetherification leads to intermediates which can be converted to cyclonucleosides under the influence of Lewis acids. Ring opening by β-elimination affords nucleosides which are stereopure at the required anomeric position.
将嘧啶基(例如,胸腺嘧啶)与2'-脱氧核糖的C-5'羟基通过溴醚化偶联,会产生中间体,可以在路易斯酸的作用下转化为环核苷。通过β-消除反应开环,得到在所需的异头位置上具有立体纯度的核苷。