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 A highly effective phosphoramidite ligand for asymmetric allylic substitution, published in 2004-04-26, which mentions a compound: 415918-91-1, Name is (11bR)-N,N-Bis[(1R)-1-phenylethyl]dinaphtho[2,1-d:1′,2′-f][1,3,2]dioxaphosphepin-4-amine, Molecular C36H30NO2P, Synthetic Route of C36H30NO2P.
Very high enantioselectivity has been achieved both in the copper-catalyzed alkylation of allylic substrates by Grignard and organozinc reagents and in the iridium-catalyzed amination of cinnamyl carbonate by employing a very efficient phosphoramidite. E.g., reaction of (E)-PhCH:CHCH2Br and Et2Zn in presence of copper(I) 2-thiophenecarboxylate and phosphoramidite ligand I gave allyl derivative II (83% conversion).
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Reference:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics