Amine substituted morpholino oligonucleotides, other than the classical N,N-dimethylamino PMO analogue, and methods of efficiently synthesizing these oligonucleotides with high yield are provided. Morpholino oligonucleotides having thiophosphoramidate, phosphoramidate, and alkyl phosphoramidate linkers. Chimeras containing unmodified DNA/RNA and other analogs of DNA/RNA can be prepared. These oligonucleotides form duplexes with complementary DNA or RNA that are more stable than natural DNA or DNA/RNA complexes, are active with RNAse H1, and may be transfected into cells using standard lipid reagents. These analogues are therefore useful for numerous applications.
除了经典的 N,N-二甲基
氨基 PMO 类似物之外,本研究还提供了胺取代的吗啉寡核苷酸,以及高效高产合成这些寡核苷酸的方法。具有
硫代
磷酰胺、
磷酰胺和烷基
磷酰胺连接体的吗啉寡核苷酸。可以制备含有未修饰 DNA/RNA 和其他 DNA/RNA 类似物的嵌合体。这些寡核苷酸与互补 DNA 或 RNA 形成双链,比天然 DNA 或 DNA/RNA 复合物更稳定,对 RNAse H1 有活性,可使用标准脂质试剂转染细胞。因此,这些类似物可用于多种用途。