Efficient Synthesis of [2‘-<sup>18</sup>O]Uridine and Its Incorporation into Oligonucleotides: A New Tool for Mechanistic Study of Nucleotidyl Transfer Reactions by Isotope Effect Analysis
作者:Qing Dai、John K. Frederiksen、Vernon E. Anderson、Michael E. Harris、Joseph A. Piccirilli
DOI:10.1021/jo701727h
日期:2008.1.1
precluded the use of heavy atom isotope effects to investigate mechanisms of nucleotidyl transfer reactions in nucleic acids. Here we achieve regioselective opening of 2,2‘-cyclouridine with [18O2]benzoic acid/potassium hydride, allowing an efficient “one-pot” synthesis of [2‘-18O]uridine in 88% yield. Conversion to the corresponding phosphoramidite enables solid-phase synthesis of [2‘-18O] RNA substrates
由于缺乏足够数量的同位素标记材料,因此无法使用重原子同位素效应来研究核酸中核苷酸转移反应的机制。在这里,我们实现了 2,2'-环尿苷与 [ 18 O 2 ] 苯甲酸/氢化钾的区域选择性打开,从而实现了 [2'- 18 O] 尿苷的高效“一锅法”合成,产率为 88%。转化为相应的亚磷酰胺能够固相合成 [2'- 18 O] RNA 底物,用于使用核苷酸转移酶和水解酶进行同位素效应研究。