Honestly don't see any teams in the Top-5 trading it for Lowry or DeRozan.
That said, I could see any of Chicago, Orlando, NYK or Cleveland trading the pick + some salary for DeRozan. Like if CLE is told Lebron will stay if they add a star guard, they'd explore this. Or maybe NYK willing to trade #9 + Ntilikina in package for DeRozan/Lowry (they are desperate for stars and hoping for more revenue via playoff experiences and more national spotlight).
If PHI don't feel they can land a Lebron or George, maybe later on they flip their 10th pick + players for Lowry/DeRozan.
I think it's unlikely still but not an impossible scenario.