Synthesis of Oligonucleotides Containing 2?-Deoxyisoguanosine and 2?-Deoxy-5-methylisocytidine Using Phosphoramidite Chemistry
作者:Simona C. Jurczyk、Janos T. Kodra、J. David Rozzell、Steven A. Benner、Thomas R. Battersby
DOI:10.1002/hlca.19980810502
日期:——
The synthesis of oligonucleotides containing 2′-deoxy-5-methylisocytidine and 2′-deoxyisoguanosine using phosphoramidite chemistry in solid-phase oligonucleotide synthesis is described. Supporting previous observations, the N,N-diisobutylformamidine moiety was found to be a far superior protecting group than N-benzoyl for 2′-deoxy-5-methylisocytidine. 2′-Deoxy-N2-[(diisobutylamino)methylidene]-5′-(4
描述了在固相寡核苷酸合成中使用亚磷酰胺化学合成包含2'-脱氧-5-甲基异胞苷和2'-脱氧异鸟苷的寡核苷酸。支持先前的观察,发现N,N-二异丁基甲am部分是对于2'-脱氧-5-甲基异胞嘧啶而言比N-苯甲酰基更好的保护基。2′-脱氧-N 2 -[((二异丁基氨基)亚甲基] -5′-((4,4′-二甲氧基叔丁基)-5-甲基异胞苷3′-(2-氰基乙基二异丙基磷酰胺基)(1c)根据二甲氧基三苯甲基的释放,在标准的自动合成方案中掺入了多个连续的残基,偶联效率> 99%使用2'-脱氧-N 6 -[((二异丁基氨基)亚甲基] -5'- O-(二甲氧基三苯甲基)-O 2-(二苯基氨基甲酰基)异鸟苷,3'-(2-氰基乙基)将标准方案的偶联时间延长至≥600s根据二甲氧基三苯甲基的释放,二异丙基亚磷酰胺(7e)成功结合了多个连续的2'-脱氧异鸟苷碱,偶联效率> 97%。