Acetylenic nucleosides. Synthesis and biological activities of some 5-ethynylpyrimidine nucleosides
作者:Ram A. Sharma、Ivan Kavai、Robert G. Hughes、Miroslav Bobek
DOI:10.1021/jm00369a032
日期:1984.3
and IIIb inhibited the replication of herpes simplex virus type I by 90% at concentrations of 2.8 X 10(-5) and 5 X 10(-5) M, respectively. Compound IIb did not show any antileukemic or antiherpes activity.
1-(2,3,5-三-O-乙酰基-β-D-阿拉伯呋喃糖基)尿嘧啶的碘化作用提供了5-碘代衍生物(Ib),该衍生物在催化量的四氢呋喃存在下用(三甲基甲硅烷基)乙炔处理(Ph3P)2PdCl2 / CuI和随后的脱保护,得到1-β-D-阿拉伯呋喃糖基-5-乙炔基尿嘧啶(Ie)。5-(二溴乙烯基)尿嘧啶的三甲基甲硅烷基衍生物与3-O-乙酰基-5-O-苯甲酰基-2-脱氧-2-叠氮基-D-阿拉伯呋喃糖基氯的缩合,然后用苯基锂处理,得到1-(2-脱氧-2-叠氮基-β-D-阿拉伯呋喃糖基)-5-乙炔基尿嘧啶(IIb)。3-O-乙酰基-5-O-苯甲酰基-2-脱氧-2-氟-D-阿拉伯呋喃糖基溴与5-乙炔基胞嘧啶的三甲基甲硅烷基衍生物缩合,随后除去保护基,得到1-(2-脱氧-2 -氟-β-D-阿拉伯呋喃糖基)-5-乙炔基胞嘧啶(IIIb)。通过NMR和ORD光谱确定IIb和IIIb的结构。化合物Ie和IIIb分别在1