Nucleosides.<b>130</b>. Synthesis of 2′-Deoxy-2′-substituted- and 5′-Deoxy-5′-substituted-ψ-uridine Derivatives. Crystalline and Molecular Structure of 2′-Chloro-2′-deoxy-1,3-dimethyl-ψ-uridine. Studies Directed Toward the Synthesis of 2′-Deoxy-2′-substituted-<i>arabino</i>-Nucleosides.<b>1</b>
作者:Krzysztof W. Pankiewicz、Kyoichi A. Watanabe、Hiroaki Takayanagi、Tsueno Itoh、Haruo Ogura
DOI:10.1002/jhet.5570220646
日期:1985.11
5′-deoxy-5′-substituted-ψ-uridine derivatives 4 from 3′,5′-O-(1, 1, 3, 3-tetraisopropyldisiloxanyl)-1,3-dimethyl-ψ-uridine 1 via a silyl rearrangement reaction. Nucleophilic displacement of the mesyloxy function of 2′-O-mesyl-1,3-dimethyl-ψ-uridine 7 afforded products with the 2′-substituent in the “down” ribo configuration 8. X-Ray crystallographic analysis of the 2′-chloro derivative 8a firmly established the
开发了一种从3',5'- O-(1,1,3,3-四异丙基二硅氧烷基)-1,3-二甲基-ψ-制备5'-脱氧-5'-取代-ψ-尿苷衍生物4的方法尿苷1通过甲硅烷基重排反应。2' - O-甲磺酰基-1,3-二甲基-ψ-尿苷7的甲磺酰氧基功能的亲核取代提供了带有2'-取代基的“向下”核糖构型的产品8。2'-氯衍生物8a的X射线晶体学分析牢固地建立了8的分子结构,并为相邻基团参与7的4-羰基官能团提供了证据。 在亲核反应中。