Oligonucleotide Analogues with Integrated Bases and Backbone. Part 22
作者:Bruno Bernet、Zeena Johar、Anne Ritter、Bernhard Jaun、Andrea Vasella
DOI:10.1002/hlca.200900203
日期:2009.12
The tritylated and silylated self‐complementary A*[s]U*[s]A*[s]U* and U*[s]A*[s]U*[s]A* tetramers 18 and 24, linked by thiomethylene groups (abbreviated as [s]) between a nucleobase and C(5′) of the neighbouring nucleoside unit were prepared by a linear synthesis based on S‐alkylation of 5′‐thionucleosides by 6‐(chloromethyl)uridines, 7 or 10, or 8‐(chloromethyl)adenosines, 12 or 15. The tetramers
三苯甲基和甲硅烷基化的自互补A * [s] U * [s] A * [s] U *和U * [s] A * [s] U * [s] A *四聚体18和24,通过硫代亚甲基连接通过线性合成基于6'(氯甲基)尿苷,7或10的5'-硫代核苷的S-烷基化反应,通过线性合成制备核碱基与相邻核苷单元的C(5')之间的基团(缩写为[s]),或8-(氯甲基)腺苷,12或15。四聚体18和24被去三苯甲基化成一元醇19和25,而它们被甲硅烷基化成二元醇20和26。, 分别。的四聚体的缔18 - 21和24 - 26在CDCl 3或在CDCl 3 /(d 6)DMSO 95:5通过用于h化学位移的浓度依赖性研究 N(3)或H 2 Ñ C(6)。通过一个且特别是两个OH基团的存在有利于通过四个碱基对连接的环状双链体的形成。二醇20与AUAU序列倾向于反向Hoogsteen碱基,和二醇26与UAUA序列沃森-克里克碱基配对。CDCl