No. Its not remotely possible, as you've described it. Briefly, you haven't described decarboxylation, heat or not. What you described is de carbonizatin, which doesn't even exist. Look at a structure, not the simplified formulas you have. The carbon is bonded to the rest of the molecule, double bonded to an oxygen, and bonded to another oxygen (that is itself bonded to a hydrogen.) Where are all the other atoms going to go, and why would carbon leave? What form would that carbon have, fullerenes, graphite or diamond? What you are describing is a pretty significant rearrangement, and those follow pretty particular rules, even if they are possible.