Provided herein are processes for preparing an oligomer (e.g., a morpholino oligomer). The synthetic processes described herein may be advantageous to scaling up oligomersynthesis while maintaining overall yield and purity of a synthesized oligomer.本文提供用於製備寡聚物(例如,嗎啉代寡聚物)之製程。本文所闡述之該等合成製程可有利地在維持所合成寡聚物之總產率及純度的同時放大寡聚物合成之規模。