Kang, Houng published the artcileEnantioselective Vanadium-Catalyzed Oxidative Coupling: Development and Mechanistic Insights, Formula: C28H41N2P, the publication is Journal of Organic Chemistry (2018), 83(23), 14362-14384, database is CAplus and MEDLINE.
The evolution of a more reactive chiral vanadium catalyst for enantioselective oxidative coupling of phenols is reported, ultimately resulting in a simple monomeric vanadium species combined with a Bronsted or Lewis acid additive. The resultant vanadium complex is found to effect the asym. oxidative ortho-ortho coupling of simple phenols and 2-hydroxycarbazoles with good to excellent levels of enantioselectivity. Exptl. and quantum mech. studies of the mechanism indicate that the additives aggregate the vanadium monomers. In addition, a singlet to triplet crossover is implicated prior to carbon-carbon bond formation. The two lowest energy diastereomeric transition states leading to the enantiomeric products differ substantially with the path to the minor enantiomer involving greater torsional strain between the two phenol moieties.
Journal of Organic Chemistry published new progress about 1160556-64-8. 1160556-64-8 belongs to quinuclidine, auxiliary class Mono-phosphine Ligands, name is 2′-(Dicyclohexylphosphino)-N2,N2,N6,N6-tetramethyl-[1,1′-biphenyl]-2,6-diamine, and the molecular formula is C28H41N2P, Formula: C28H41N2P.
Referemce:
https://en.wikipedia.org/wiki/Quinuclidine,
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