2‘-Chloro-2‘,3‘-dideoxy-3‘-fluoro-<scp>d</scp>-ribonucleosides: Synthesis, Stereospecificity, Some Chemical Transformations, and Conformational Analysis
作者:Igor A. Mikhailopulo、Tamara I. Pricota、Grigorii G. Sivets、Cornelis Altona
DOI:10.1021/jo0340859
日期:2003.7.1
afforded 2',3'-didehydro-2',3'-dideoxy-2'-chloro-d-pentofuranosyl nucleosides as the principal products (47-81%) of the reaction, along with recovered starting nucleoside (11-33%) (Scheme 3). Easy HF elimination was also observed in the case of the 2'-azido-2',3'-dideoxy-3'-fluoro-beta-d-ribofuranosides of thymine (17) and adenine (20) (Scheme 3). The role of conformational peculiarities of 2'-chloro-2'
5-O-苯甲酰基-2-氯-2,3-二脱氧-3-氟-β-d-呋喃核糖苷甲基的合成(5)及其作为全硅烷化胸腺嘧啶N(6)-苯甲酰腺嘌呤的糖基化剂的用途,描述了N(4)-苯甲酰基胞嘧啶(方案1)。将合成的2'-氯-2',3'-二脱氧-3'-氟-d-核糖核苷转化为2',3'-二脱氧-3'-氟-α-和-β-d-胸腺嘧啶(13a,b),腺嘌呤(14a,b)和胞苷(15a,b)的赤型-呋喃呋喃糖核苷,在α,α'-偶氮二异丁腈存在下,用氢化三丁基锡处理(方案2)。用1 M MeONa / MeOH在回流下处理2'-氯-2',3'-二脱氧-3'-氟-d-核糖核苷1-5小时,得到2',3'-二氢化-2',3' -二脱氧-2' 反应的主要产物是-氯-d-戊呋喃糖基核苷(47-81%),以及回收的起始核苷(11-33%)(方案3)。在胸腺嘧啶(17)和腺嘌呤(20)的2'-叠氮基2',3'-二脱氧氧基3'-氟-β
Synthesis and Conformational Analysis of 1′- and 3′-Substituted 2-Deoxy-2-fluoro-D-ribofuranosyl Nucleosides
作者:Grigorii G. Sivets、Elena N. Kalinichenko、Igor A. Mikhailopulo
DOI:10.1002/hlca.200790191
日期:2007.9
with silylated N6-benzoyladenine to afford, after deprotection, 2′,3′-dideoxy-2′,3′-difluoroadenosine (13). Condensation of 1-O-acetyl-3,5-di-O-benzoyl-2-deoxy-2-fluoro-β-D-ribofuranose (14) with silylated N2-palmitoylguanine gave, after chromatographic separation and deacylation, the N7-β-anomer 17 as the main product, along with 2′-deoxy-2′-fluoroguanosine (15) and its N9-α-anomer 16 in a ratio of ca