作者:Vorasit Vongsutilers、Jonathan Daft、Kevin Shaughnessy、Peter Gannett
DOI:10.3390/molecules14093339
日期:——
A general scheme for the synthesis of C8-arylpurine phosphoramidites has been developed. C8-Arylation of C8-bromo-2′-deoxyguanosine is the key step and has been achieved through the use of a Suzuki coupling. Since the coupling reaction is conducted under aqueous conditions, it is unnecessary to protect and then deprotect the hydroxyl groups, thus saving several steps and improving overall yields. Once the C8-arylgroup is introduced, the glycosidic bond becomes very sensitive to acid catalyzed cleavage. Protection of the amino groups as the corresponding N,N-dimethylformamidine derivative improves stability of the derivatives. Synthetic C8-arylpurines were successfully used to prepare synthetic oligonucleotides.
我们开发了一种合成 C8 芳基嘌呤磷酰胺的通用方案。C8-溴-2′-脱氧鸟苷的 C8-芳基化是关键步骤,是通过使用铃木偶联法实现的。由于偶联反应是在水性条件下进行的,因此不需要先保护羟基,然后再去保护羟基,从而节省了多个步骤,提高了总产率。一旦引入 C8 芳基,糖苷键就会对酸催化裂解变得非常敏感。用相应的 N,N-二甲基甲酰胺衍生物保护氨基基团可提高衍生物的稳定性。合成的 C8 芳基嘌呤被成功用于制备合成寡核苷酸。