Not really, and I wouldn't suggest doing it anyway. It will just sound messy with similar channels overlapping and coming from the wrong place.
You would get surround sound from your current speakers and (simulated) surround sound from the soundbar. Even if you are just using your current rears, there is no way to separate the rear channel from the Soundbar (without using hte Bose Surround Speakers).
I can't think of any soundbar that you can use as a centre/front channel for a Receiver surround system.