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 Azine-N-oxides as effective controlling groups for Rh-catalyzed intermolecular alkyne hydroacylation, published in 2021, which mentions a compound: 36620-11-8, Name is Bis(norbornadiene)rhodium (I) tetrafluoroborate, Molecular C14H8BF4Rh, Reference of Bis(norbornadiene)rhodium (I) tetrafluoroborate.
Azine N-oxide substituted aldehydes are used as highly effective substrates with good reactivity for intermol. hydroacylation of alkynes. Employing a Rh(I)-catalyst, a mild and scalable aldehyde C-H activation, that permits the coupling with unactivated terminal alkynes was achieved in good yields and with high regioselectivities (up to >20 : 1 l:b). Both substrates can tolerate a broad variety of functional groups. The reaction can also be applied to diazine aldehydes that contain a free N-lone pair. Conversion of the hydroacylation products to the corresponding azine, through a one-pot hydroacylation/deoxygenation sequence was also demonstrated. A one-pot hydroacylation/cyclization, using N-Boc propargylamine, addnl. leads to the synthesis of a bidentate pyrrolyl ligand.
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Reference:
Quinuclidine – Wikipedia,
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