A modified phosphotriester method has been successfully applied for the chemical synthesis of ribooligonucleotides. The starting material is a fully protected ribomononucleoside containing a 3′-phosphotriester group 5. The coupling reaction is performed using mesitylenesulfonyl tetrazole and purification of the product achieved using reversed phase column chromatography. The effectiveness of this method has been demonstrated by achieving an efficient and rapid synthesis of r-A7, r-A11, r5′-AAACAUGAGGA-3′, and r5′-UUACCCAUGU-3′ (R-17, translation control sequence).
一种改良的磷酸三酯方法已成功应用于核糖寡核苷酸的化学合成。起始物是含有3'-磷酸三酯基团的完全保护的核糖单核苷酸。偶联反应使用二甲苯磺酰四唑进行,并通过反相柱层析纯化产物。该方法的有效性已通过成功合成r-A7、r-A11、r5′-AAACAUGAGGA-3′和r5′-UUACCCAUGU-3′(R-17,翻译控制序列)来证明。