SYNTHESIS OF SELENIUM-DERIVATIZED NUCLEOSIDES AND OLIGONUCLEOTIDES FOR X-RAY CRYSTALLOGRAPHY
作者:Nicolas Carrasco、Dov Ginsburg、Quan Du、Zhen Huang
DOI:10.1081/ncn-100105907
日期:2001.9.30
We report here the synthesis of nucleoside and oligonucleotide analogs containing selenium, which serves as an anomalous scattering center to enable MAD phase determination in nucleotide X-ray crystallography. We have developed a phase transfer approach to introduce the selenium functionality in A, C, G, T, and U nucleosides at 5′-positions. In the incorporation of the selenium functionality, the leaving
我们在这里报告了含有硒的核苷和寡核苷酸类似物的合成,硒作为异常散射中心,可以在核苷酸 X 射线晶体学中确定 MAD 相。我们开发了一种相转移方法,以在 A、C、G、T 和 U 核苷的 5' 位引入硒功能。在引入硒官能团时,离去基团(溴化物、甲磺酰基和甲苯磺酰基)很容易被硒化钠、二硒化钠和甲基硒化钠取代,产率高于 90%。硒衍生的寡核苷酸已通过亚磷酰胺化学合成。