No. Best you could do with those points is a *A award on UA. US miles are US miles unfortunately.
You could probably do a transfer thru points.com if UA's still participating (CO did), but you'd likely get a horrid exchange rate that wouldn't be worth it.
With UR points, if you can swing it, you can book the ticket thru Chase and use the UR points as a discount on the ticket. That way you could still earn PQMs and RDMs that you could credit back to either US or UA.