3-DeazaguanineN7- andN9-(2?-Deoxy-?-D-ribofuranosides): Building Blocks for Solid-Phase Synthesis and Incorporation into Oligodeoxyribonucleotides
作者:Frank Seela、Sigrid Lampe
DOI:10.1002/hlca.19910740821
日期:1991.12.11
Oligonucleotides continuing 3-deaza-2′-deoxyguanosine (I) or its N7-regioisomer 2 were prepared by solid-phase synthesis using P111 chemistry. Protection of 1 or 2 with N,N V-dimethylformamide diethyl acetal followed by 4,4′-dimethoxytritylation afforded imidazo[4,5-c]pyridines 10b and 11b, respectively. The latter were converted into the 3′-phosphonates 10c or lie, respectively; the cyanoethyl N,
连续的3-deaza-2'-脱氧鸟苷(I)或其N 7-区域异构体2的寡核苷酸通过使用P 111化学的固相合成来制备。用N,N -V-二甲基甲酰胺二乙缩醛保护1或2,然后进行4,4'-二甲氧基三苯甲基化,分别得到咪唑并[4,5- c ]吡啶10b和11b。后者转化成3'-膦酸酯10 Ç分别或Ile; 氰乙基N,N-二异丙基亚磷酰胺10d也准备好了。寡核苷酸构件被用于自动化固相合成中。1他自身互补寡聚体13,15,和17中制备,并用蛇毒磷酸二酯酶随后碱性磷酸酶,其特征在于酶水解。CD光谱显示出B-DNA的一般结构。