I know the cantrip Shocking Grasp removes an enemy's ability to use its Reaction if you hit:
... On a hit, the target takes 1d8 lightning damage, and it can't take reactions until the start of its next turn.
I am not very familiar with the spells available but am theory-crafting a caster. Assuming you can take from any class spell list, what other spell options are there if I am looking to take away an enemy's reaction?