The only way to do that is to connect the headphone out of the Bose to a line level input on the Sony receiver. You will need to keep the Bose volume down enough so it doesn't overload the input on the Sony. If it's too loud then you will get distortion regardless of how loud the Sony volume it set. After you set the Bose volume use the Sony for volume control.
A speaker to line level converter could be used to reduce the headphone output but it will work either way.