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 Examination of the mechanism of Rh2(II)-catalyzed carbazole formation using intramolecular competition experiments, published in 2009-09-04, which mentions a compound: 67929-86-6, Name is Methyl 5-methoxyindole-2-carboxylate, Molecular C11H11NO3, Recommanded Product: 67929-86-6.
The use of a rhodium(II) carboxylate catalyst enables the mild and stereoselective formation of carbazoles from biaryl azides. Intramol. competition experiments of triaryl azides suggested the source of the selectivity. A primary intramol. kinetic isotope effect was not observed, and correlation of the product ratios with Hammett σ+ values produced a plot with two intersecting lines with opposite ρ values. These data suggest that electronic donation by the biaryl π-system accelerates the formation of rhodium nitrenoid and that C-N bond formation occurs through a 4π-electron-5-atom electrocyclization.
In addition to the literature in the link below, there is a lot of literature about this compound(Methyl 5-methoxyindole-2-carboxylate)Recommanded Product: 67929-86-6, illustrating the importance and wide applicability of this compound(67929-86-6).
Reference:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem