There isn't a direct Patriots-49ers trade rumor in the wiki right now. The active Patriots trade rumor involves Maxx Crosby — but he's a Raider, not a 49er.
Here's the closest link: The 49ers were named alongside the Eagles as "nuclear hot" suitors for Maxx Crosby per a Raiders insider (from the Maxx Crosby page). Meanwhile, ESPN's Dan Graziano previously listed the Patriots as one of four teams that could be in the mix for Crosby ahead of the trade deadline.
So the 49ers and Patriots are both circling the same player (Crosby), but there's no rumor of a direct trade between the two teams. If anything, they'd be competing for the Raiders' star pass rusher — though Crosby has a cryptic social media post up amid all this speculation, and his health (coming off an injury) remains a factor.