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 Enantioselective synthesis of 8-azabicyclo[3.2.1]octanes via asymmetric 1,3-dipolar cycloadditions of cyclic azomethine ylides using a dual catalytic system, published in 2019, which mentions a compound: 1260795-42-3, Name is Methyl 4-bromo-2-formylbenzoate, Molecular C9H7BrO3, COA of Formula: C9H7BrO3.
The first example of asym. 1,3-dipolar cycloadditions between diazo imine-derived cyclic azomethine ylides and acryloylpyrazolidinone using a rhodium(II) complex/chiral Lewis acid binary system is reported [e.g., diazo oxime I + pyrazolidinone II → III (95-97%, > 99:1 exo:endo, 97-99% ee)]. The asym. cycloadditions afforded optically active 8-azabicyclo[3.2.1]octanes with high diastereo- and enantioselectivities (up to >99 : 1 dr, 99% ee). A switch of exo/endo-selectivity was observed depending on the diazo substrates.
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Reference:
Benzofuran – Wikipedia,
Benzofuran | C8H6O – PubChem