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 Inverse Electron Demand (3 + 2) Cycloaddition of Palladium-Oxyallyl Enabled by a Hydrogen-Bond-Donating Ligand, published in 2021-01-20, which mentions a compound: 291536-01-1, Name is (2S)-1-[(4R)-4,5-dihydro-4-phenyl-2-oxazolyl]-2-(diphenylphosphino)ferrocene, Molecular C31H26FeNOP, Electric Literature of C31H26FeNOP.
A method for enantioselective (3 + 2) cycloaddition reactions between palladium-oxyallyl species and electron-deficient nitroalkenes has been reported. This transformation is enabled by a rationally designed hydrogen-bond-donating ligand (FeUrPhos) and proceeds via an inverse electron demand pathway. Using this method, cyclopentanones I (R = n-Bu, Ph, PhCH2CH2, 4-MeC6H4, 3-ClC6H4, 2-naphthyl, etc.; R1 = H, R2 = H, 2-O2NC6H4, 4-FC6H4, 2-naphthyl, etc; R1 = Me, R2 = H) with up to three contiguous stereocenters were assembled with high enantioselectivity and good to excellent diastereoselectivity from cyclic carbonates II and nitroalkenes O2NCR1:CHR2.
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Reference:
Bromide – Wikipedia,
bromide – Wiktionary