9-(2?-Deoxy-?-D-xylofuranosyl)adenine Building Blocks for Solid-Phase Synthesis and Properties of Oligo(2?-deoxy-xylonucleotides)
作者:Helmut Roscmeycr、Marcela Kre?merova、Frank Seela
DOI:10.1002/hlca.19910740840
日期:1991.12.11
The 9-(2′-deoxy-à-D-threo-pentofuranosyl)adenine (=9-(2′-deoxy-à-D-xylofuranosyl)adeninc, xAd; 2) was protected at its 6-NH2 group with cither a benzoyl (5a) or a (dimethyfamino)methylidcnc (6a) residue and with a dimethoxytntyl group at 5′-OH (5b, 6b). Compounds 5b and 6b were then converted into the 3′-phosphonates 5c and 6c; moreover, the 2-cyanoethyl phosphoramidite 6d was synthesized starting
9-(2'-脱氧-D-苏-戊呋喃糖基)腺嘌呤(= 9-(2'-脱氧-D-木糖基呋喃糖基)腺嘌呤,xA d ; 2)的6-NH 2基团被保护。其具有苯甲酰基(5a)或(二甲基氨基氨基)甲基(6a)残基,并且在5'-OH处具有二甲氧基叔丁基(5b,6b)。然后将化合物5b和6b转化为3'-膦酸酯5c和6c;此外,从fib开始合成了2-氰基乙基亚磷酰胺6d。DNA构件用于d [(xA)12 2-A](8)的固相合成。后者与d [(xT)12-T](Tm = 35°);相反,对于d(T 12),未观察到络合物形成。此外,XAD和XTD被引入自互补dodccamcr d(GTAGAATTCTAC)(12在不同的位置)的LO得到oligomcrs 13 - 16。所有寡核苷酸均通过依赖温度的CD和UV光谱进行表征,此外,还通过T跳跃实验表征了14种寡核苷酸。从浓度依赖性的T m测量值,推导了寡核苷酸的