In general, if the atoms that make up the ring contain heteroatoms, such rings become heterocycles, and organic compounds containing heterocycles are called heterocyclic compounds. An article called Cobalt-Catalyzed Decarboxylative 2-Benzoylation of Oxazoles and Thiazoles with α-Oxocarboxylic Acids, published in 2015-11-06, which mentions a compound: 118994-89-1, Name is Ethyl oxazole-5-carboxylate, Molecular C6H7NO3, Synthetic Route of C6H7NO3.
Cobalt-catalyzed decarboxylative cross-coupling of oxazoles and thiazoles with α-oxocarboxylic acids was developed through an sp2 C-H bond functionalization process. This work represents the first example of cobalt-catalyzed decarboxylative C-H bond functionalization and provides an efficient means of building some important bioactive heteroaryl ketone derivatives
As far as I know, this compound(118994-89-1)Synthetic Route of C6H7NO3 can be applied in many ways, which is helpful for the development of experiments. Therefore many people are doing relevant researches.