1,N6-Etheno-7-deaza-2,8-diazaadenosine: syntheses, properties and conversion to 7-deaza-2,8-diazaadenosine
作者:Wenqing Lin、Hong Li、Xin Ming、Frank Seela
DOI:10.1039/b418849g
日期:——
1,N6-Etheno-7-deaza-2,8-diazaadenosine (4) was synthesized from 8-aza-7-deazaadenosine (6) in 64% overall yield. The starting material 6 was obtained by the direct glycosylation of 8-aza-7-deazaadenine (7) with 1-O-acetyl-2,3,5-tri-O-benzoyl-β-D-ribofuranose (8) (NO2 CH3, BF3·Et2O; 77% yield). Compound 4 was transformed into 7-deaza-2,8-diazaadenosine (5). The fluorescence of compound 4 shows an emission maximum at 531 nm (phosphate buffer; pH 7.0), which is bathochromically shifted compared to 1,N6-etheno-2-azaadenosine (3a) (495 nm). A conformational analysis was performed in the solid state and in solution.
1,N6-Etheno-7-去氮-2,8-二氮腺苷(4)以64%的总产率从8-氮杂-7-去氮腺苷(6)合成。原料6是通过8-氮杂-7-去氮腺嘌呤(7)与1-O-乙酰基-2,3,5-三-O-苯甲酰基-β-D-呋喃核糖(8)直接糖基化获得的(NO2 CH3, BF3·Et2O; 产率77%)。化合物4被转化为7-去氮-2,8-二氮腺苷(5)。化合物4的荧光显示在531 nm处有最大发射峰(磷酸盐缓冲液;pH 7.0),与1,N6-乙烯基-2-氮杂腺苷(3a)(495 nm)相比,发生了向红端偏移。在固态和溶液中进行了构象分析。