Pseudo-cross-conjugated mesomeric betaines and N-heterocyclic carbenes of indazole
1,2-Dimethylindazolium-3-carboxylates are pseudo-cross-conjugated mesomeric betaines (PCCMB) and derivatives of the indazole alkaloid Nigellicin. They decarboxylate on heating to give intermediary N-heterocyclic carbenes of indazole that can be trapped wi
N1-substituted 1H-indazole-3-ethyl carboxylates and 1H-indazole-3-hydroxamic acids
Sixty five new derivatives of ethyl-1H-indazole-3-carboxylate are described; they contain in N1 various aliphatic or aromatic acyl radicals. Moreover halogens or methyl groups are present as substituents at the 5 position or methyl groups at 5,6. The synt