Synthesis and Antiviral Activity of Novel Erythrofuranosyl Imidazo[1,2-<i>a</i>]pyridine C-Nucleosides Constructed via Palladium Coupling of Iodoimidazo[1,2-<i>a</i>]pyridines and Dihydrofuran
作者:Kristjan S. Gudmundsson、John D. Williams、John C. Drach、Leroy B. Townsend
DOI:10.1021/jm020339r
日期:2003.4.1
glycosidic linkage in TCRB prompted us to synthesize the structurally similar imidazo[1,2-a]pyridine erythrofuranosyl C-nucleosides. As an approach to the synthesis of polychlorinated imidazo[1,2-a]pyridine C-3-erythrofuranosides, a palladium-based methodology for coupling 2,3-dihydrofuran with chlorinated 3-iodoimidazo[1,2-a]pyridines was developed and optimized to give 80-90% yields of 2,6-dichloro- and
2,5,6-三氯-1-(β-d-呋喃呋喃糖基)苯并咪唑(TCRB)和某些类似物已显示出对人巨细胞病毒的显着活性。TCRB中糖苷键的代谢不稳定,促使我们合成了结构相似的咪唑并[1,2-a]吡啶-呋喃呋喃糖基C-核苷。作为合成多氯咪唑并[1,2-a]吡啶C-3-赤呋喃糖苷的一种方法,开发了一种基于钯的方法,将2,3-二氢呋喃与氯化的3-碘咪唑并[1,2-a]吡啶偶合。并进行了优化,以得到80-90%的2,6-二氯-和2,6,7-三氯-3-(2,3-二脱氧-2,3-二氢化-d / l-异呋喃呋喃糖基)咪唑[1, 2-α] p吡啶。用二氧化或AD-mixα对这些双脱氢衍生物进行二羟基化反应,得到了呋喃呋喃糖基C-核苷的混合物,先用标准方法分离,然后再进行手性色谱分离。筛选抗HCMV和HSV-1活性时,证明2,6,7-三氯-3-(赤呋喃呋喃糖基)咪唑并[1,2-a]吡啶的α-d异构体是该系列中最活跃