Nucleosides and nucleotides. LXXXVIII. Synthesis of 6,6'-cyclo-5',6'-dideoxy-1-(.BETA.-D-allofuranosyl)cytosine and related nucleosides.
作者:Yuichi YOSHIMURA、Akira MATSUDA、Tohru UEDA
DOI:10.1248/cpb.37.660
日期:——
A new synthetic route to 6, 6'-cyclo-5', 6'-dideoxy-1-(β-D-allofuranosyl)-uracil, -cytosine, and -4-thiouracil is described. The method involves a base-catalyzed condensation of 2, 4-dimethoxy-6-methylpyrimidine and 1-O-methyl-2, 3-O-isopropylidene-β-D-ribopentofuranosyldialdehyde, followed by an intramolecular glycosylation, and derivatization of the base moiety. The relationship of the sign of the circular dichroism (CD) spectra of carbon-bridged cyclopyrimidine nucleosides to the glycosyl torsion angle is discussed.
本文描述了一种合成 6,6'-环-5',6'-双脱氧-1-(β-D-异呋喃糖基)-脲嘧啶、-胞嘧啶和-4-硫脲嘧啶的新方法。该方法包括碱催化 2,4-二甲氧基-6-甲基嘧啶和 1-O-甲基-2,3-O-异亚丙基-β-D-呋喃核糖基二醛缩合,然后进行分子内糖基化和碱基衍生化。讨论了碳桥环嘧啶核苷的圆二色性(CD)光谱的符号与糖基扭转角的关系。