I can't see Lopez for picks straight up, that is for sure, but perhaps somewhat more possible is a 3-way. If Lopez is healthy and playing well, there would be interest from contending teams. So the third team would need to be someone like Miami who would benefit from Lopez and has some young players that would be of interest to Boston.
I also question whether we are talking about picks (plural) or pick. I don't think something like this would involve more than 1 of the picks. I know the swap is a lot less value than a pick but I think this could get done if we wanted to (and I am not sure I would want to), with just the 2016 or 2018 pick plus other lesser parts and pieces.