Synthesis and properties of trans-3',4'-bridged nucleic acids having typical S-type sugar conformation.
Synthesis and properties of trans-3',4'-bridged nucleic acids having typical S-type sugar conformation.
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DOI：
10.1021/jo051187l
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发表时间：
2006-01
期刊：
影响因子：
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通讯作者：
M. Sekiguchi;S. Obika;Y. Harada;T. Osaki;Roongjang Somjing;Y. Mitsuoka;Nao Shibata;M. Masaki;T. Imanishi
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文献类型：
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作者：
M. Sekiguchi;S. Obika;Y. Harada;T. Osaki;Roongjang Somjing;Y. Mitsuoka;Nao Shibata;M. Masaki;T. Imanishi
The synthesis of nucleoside analogues with a conformationally restricted sugar moiety is of great interest. The present research describes the synthesis of BNA (bridged nucleic acid) monomers 1 and 2 bearing a 4,7-dioxabicyclo[4.3.0]nonane skeleton and a methoxy group at the C2' position. Conformational analysis showed that the sugar moiety of these monomers is restricted in a typical S-type conformation. It was difficult to synthesize the phosphoramidite derivative of the ribo-type monomer 1, while the phosphoramidite of the arabino-type monomer 2 was successfully prepared and incorporated into oligodeoxynucleotides (ODNs). The hybridization ability of the obtained ODN derivatives containing 2 with complementary strands was evaluated by melting temperature (T(m)) measurements. As a result, the ODN derivatives hybridized with DNA and RNA complements in a sequence-selective manner, though the stability of the duplexes was lower than that of the corresponding natural DNA/DNA or DNA/RNA duplex.
