That's a feature that scheme has that common lisp doesn't, but is this supported by a new syntax? I think that it is not clear cut what is a syntactical difference versus a difference in the feature set.

edit: I guess what I'm really asking is there someway in lisp to make a construct that would look just like call/cc? If you could then that's just a feature difference, but if you can't I would agree that's a syntactical difference.