This is almost never a good transfer unless you are topping off for an award you are ready to book. Keep in mind that we value a Chase Ultimate Rewards point at roughly 3X the value of a Marriott Bonvoy point.
However, there are always exceptions and you might find a 5 night stay (5th night free) where the transfer makes sense, so do the math – but you likely do not want to transfer speculatively unless you are a Bonvoy pro and believe you will exceed value you can get via other Ultimate Rewards partners.