Synthesis of a Novel Bicyclic Nucleoside Restricted to an <i>S</i>-Type Conformation and Initial Evaluation of Its Hybridization Properties When Incorporated into Oligodeoxynucleotides
作者:Lisbet Kværnø、Richard H. Wightman、Jesper Wengel
DOI:10.1021/jo015602v
日期:2001.7.1
racil-1-yl)-5-aza-2-oxabicyclo[2.2.1]heptane 18 of a novel bicyclic nucleoside structure was synthesized from the known 1-(3'-deoxy-beta-D-psicofuranosyl)uracil 3. Conformational analysis of its structure verified its expected S-type furanose conformation, and the secondary amino group in the 4'-position allowed for incorporation into oligonucleotides using 5' --> 3' directed oligonucleotide synthesis
亚磷酰胺(1S,3R,4S)-3-(2-氰基乙氧基(二异丙基氨基)次膦氧甲基)-5-N-(4-单甲氧基三苯甲基)-1-(尿嘧啶-1-基)-5-氮杂-2-氧杂双环[ 2.2.1]由已知的1-(3'-脱氧-β-D-psicofuranosyl)尿嘧啶3合成新型双环核苷结构的庚烷18。对其结构进行构象分析,验证了其预期的S型呋喃糖构象,并且使用5'-> 3'定向的寡核苷酸合成方法,可将4'位置的仲氨基掺入寡核苷酸中,如先前对氨基磷酸酯所述。热变性研究表明,每种修饰对互补DNA和RNA的双链稳定性分别为-4.3和-2.7摄氏度,相当大的降低。