it's hard to escalate a situation that has played out in public for weeks and the 49ers aren't coming to the table. this can't move the needle--trade request/demand provides zero leverage.
obviously they have already considered a trade--it's one of only 3 options they have. likewise, every potentially interested team already understood it was one of the 49ers options. it's likely his demands are massive and they don't see the need to shell out this year. a team trading for him would have to resign him for this massive amount as well as give up picks for a guy with one year left on his contract.
the 49ers probably replied to this request with "yeah, ok"