Nucleotides Part LI. Synthesis and biological activities of (2′-5′)adenylate trimer conjugates with 2′-terminal 3′-<i>O</i>(ω-hydroxyalkyl) and 3′-<i>O</i>-(ω-carboxyalkyl) spacers
作者:Cornelia Hörndler、Wolfgang Pfleiderer、Robert J. Suhadolnik、Robert J. Suhadolnik、Nicholas F. Muto、Earl E. Henderson、Earl E. Henderson、Ming-Xu Guan
DOI:10.1002/hlca.19970800313
日期:1997.5.12
An efficient strategy for the synthesis of (2′-5′)adenylate trimer conjugates with 2′-terminal 3′-O-(ω-hydroxyalkyl) and 3′-O-(ω-carboxyalkyl) spacers is reported. Npeoc-protected adenosine building blocks 37--40 for phosphoramidite chemistry carrying a 3′-O-[11-(levulinoyloxy)undecyl], 3′-O-2-[2-(levulinoyloxy)ethoxy]ethyl}, 3′-O-[5-(2-cyanoethoxycarbonyl)pentyl], and 3′-O-5-[(9H-fluoren-9-ylmeth
报道了合成具有2'-末端3'- O-(ω-羟烷基)和3' - O-(ω-羧基烷基)间隔基的(2'-5')腺苷酸三聚体共轭物的有效策略。Npeoc保护的腺苷结构单元37--40,用于亚磷酰胺化学,带有3'- O- [11-(乙酰氧基氧基)十一烷基],3'- O- 2- [2-(乙酰氧基氧基)乙氧基]乙基},3' - ö - [5-(2- cyanoethoxycarbonyl)戊基],和3'- ö - 5 - [(9 ħ芴-9-基甲氧基)羰基]戊基}部分,分别制备(NPEOC = 2-( 4-硝基苯基)乙氧基羰基)。虫草素(3'-脱氧腺苷)二聚体1的缩合导致相应的三聚体42、43、47和48。而乙酰丙酰基(lev)和9 H-芴-9-甲基(fm)封闭基团可以选择性地从三聚体42、43和48上裂解掉,产生中间体44、45,和49用于3'-合成ø - (ω-羟基烷基)三聚体53,54和胆固醇缀