Preparation of Heterocumulenes from Carbonic Acid Derivatives

1 Preparation of Heterocumulenes from Carbonic Acid (Derivatives) 

8 Carbonic Acid Derivatives and Heterocumulenes and Their Interconversion 

a good leaving group is available after a different kind of activation and, at the same time, a good donor is present after anion formation unknown. 

By the way, aromatic and aliphatic isocyanates do not only undergo acidic but—even if much more slowly—neutral hydrolysis. Again, the first hydrolysis product is an unstable A-aryl or A-alkyl carbamic acid. It decomposes under these conditions, though not according 

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