Carnepan

Yes, I looked at the original articles and did as described in them, but the syntheses do not work. According to NMR data, there is only the initial substance in the solution, and no product was observed I understand that I could be wrong about them, so I need someone who could tell me about the intricacies of organic synthesis. I am just a specialist in inorganic synthesis, and I encountered organic synthesis for the first time

Yes, I tried to synthesize this compound based on these considerations. Not a single reaction worked, since there is no exact description of the synthesis. If you have one, please share it.

Hello For further research I need mesoxalate (as acid or salt). It is quite expensive in stores, so I decided to synthesize it in the lab. I tried to hydrolyze alloxan with alkali (NaOH or Ba(OH)2), but I only got alloxanate of the corresponding salt. I also tried to oxidize diethyl malonate with NO2 and NaClO2, but the oxidation did not work at all. Does anyone have a working synthesis method? Or can anyone help me figure out what went wrong?