I think you could build that into the back of the cabinet without losing a lot of space. Just 45 it flat to the back wall of the cabinet...
I'm not quite sure what you mean by "45 it flat to the back wall of the cabinet". Do you mean like in the pic below? That's a good suggestion, one I hadn't considered.... duhhhh!!! :-) If so, I have three followup questions:
1. If work needed to be done on the drain line, the base cabinet to the left of the sink would need to be removed, which could be problematic. Is there anything in the code stating how much access is required to the drain line in these situations? I doubt it (since it can go into walls) but thought I would ask.
2. Does the 45 add any 'EXTRA' length to the drain pipe length... kind of like in HVAC where bends and turns are an efficiency drain?