Synthesis of 8-Aza-1,3-dideaza-2?-deoxyadenosine and 5,6-Disubstituted Benzotriazole 2?-Deoxy-?-D-Ribofuranosidesvia Nucleobase-Anion Glycosylation
作者:Zygmunt Kazimierczuk、Frank Seela
DOI:10.1002/hlca.19900730211
日期:1990.3.14
The synthesis of 8-aza-1,3-dideaza-2′-deoxyadenosine (3a) as well as of 4- and 5,6-substituted benzotriazole 2′-deoxy-β-D-ribonucleosides is described (Schemes 1–3). Glycosylation of benzotriazole anions is stereoselective in all cases (exclusive β-D-anomer formation), but regioisomeric N1, N2, and N3-(2′-deoxyribofuranosides) are formed. The distribution of the regioisomers is controlled by the nucleobase
描述了8-氮杂-1,3-二氮杂氮杂2'-脱氧腺苷(3a)以及4-和5,6-取代的苯并三唑2'-脱氧-β-D-核糖核苷的合成方法(方案1-3))。苯并三唑阴离子的糖基化在所有情况下都是立体选择性的(不包括β-D-异头物形成),但会形成区域异构的N 1,N 2和N 3-(2'-脱氧核糖呋喃糖苷)。区域异构体的分布由核碱基取代基控制。通过UV和NMR结合一维NOE差光谱法确定端基异构体构型以及糖基化位置。4-氨基苯并三唑2'-脱氧-β-D-呋喃呋喃糖苷3a的非质子化形式–c显示强荧光。