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
9-(3-X-2,3-dideoxy-2-fluoro- β -D-rifurfuranosyl)adenenes 5(X = N 3)和7(X = NH 2)及其各自的收敛合成描述了使用甲基2-叠氮基-5 - O-苯甲酰基-2,3-二脱氧-2-氟-β -D-呋喃呋喃糖苷(4)作为糖基化剂的α-端基异构体6和8。从两种前体开始,制备甲基5- O-苯甲酰基-2,3-二脱氧-2,3-二氟-β -D-呋喃呋喃糖苷(12),并与甲硅烷基化的N 6偶联。-苯甲酰腺嘌呤在脱保护后得到2',3'-二脱氧-2',3'-二氟腺苷(13)。1-缩合ø -乙酰基-3,5-二- ø -苯甲酰基-2-脱氧-2-氟- β -D-呋喃核糖(14)与甲硅烷基化Ñ 2 -palmitoylguanine得到,色谱分离和脱酰,所述后Ñ 7 - β-端基异构体17为主要产物,以及2'-脱氧-2'-氟鸟苷(15)及其N 9 -