Most of the compounds have physiologically active properties, and their biological properties are often attributed to the heteroatoms contained in their molecules, and most of these heteroatoms also appear in cyclic structures. A Journal, Article, Angewandte Chemie, International Edition called Complementing Pyridine-2,6-bis(oxazoline) with Cyclometalated N-Heterocyclic Carbene for Asymmetric Ruthenium Catalysis, Author is Li, Long; Han, Feng; Nie, Xin; Hong, Yubiao; Ivlev, Sergei; Meggers, Eric, which mentions a compound: 31181-89-2, SMILESS is O=CC1=NC=C(Cl)C=C1, Molecular C6H4ClNO, Application of 31181-89-2.
A strategy for expanding the utility of chiral pyridine-2,6-bis(oxazoline) (pybox) ligands for asym. transition metal catalysis is introduced by adding a bidentate ligand to modulate the electronic properties and asym. induction. Specifically, a ruthenium(II) pybox fragment is combined with a cyclometalated N-heterocyclic carbene (NHC) ligand to generate catalysts for enantioselective transition metal nitrenoid chem., including ring contraction to chiral 2H-azirines (up to 97% ee with 2000 TON) and enantioselective C(sp3)-H aminations (up to 97% ee with 50 TON).
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Reference:
Phosphine ligand,
Chiral phosphine ligands in asymmetric synthesis. Molecular structure and absolute configuration of (1,5-cyclooctadiene)-(2S,3S)-2,3-bis(diphenylphosphino)butanerhodium(I) perchlorate tetrahydrofuran solvate