An object of the present invention is to provide a novel preparation method that can shorten the preparation period of an oligonucleic acid compound.
An example of the present invention is a method for subjecting a compound [A] having a hydroxyl group or a primary or secondary amino group and a compound [B] having a substituent containing a phosphorus atom and represented by the following general formula [1]:
to a condensation reaction to prepare a compound [C] represented by the following general formula [C]:
wherein the condensation reaction is carried out in a mixed solvent containing a polar solvent and a halogen solvent as a reaction solvent.
本发明的目的是提供一种可缩短寡核酸化合物制备周期的新型制备方法。
本发明的一个例子是将具有羟基或伯
氨基或仲
氨基的化合物[A]和具有含
磷原子的取代基并由下式通式[1]表示的化合物[B]的制备方法:
进行缩合反应以制备由以下通式[C]表示的化合物[C]的方法:
其中缩合反应在含有极性溶剂和卤素溶剂作为反应溶剂的混合溶剂中进行。