Reference of Bis((S)-4-phenyl-4,5-dihydrooxazol-2-yl)methane. Aromatic heterocyclic compounds can also be classified according to the number of heteroatoms contained in the heterocycle: single heteroatom, two heteroatoms, three heteroatoms and four heteroatoms. Compound: Bis((S)-4-phenyl-4,5-dihydrooxazol-2-yl)methane, is researched, Molecular C19H18N2O2, CAS is 132098-59-0, about New asymmetric vanadium catalyst for highly selective oxidative coupling polymerization. Author is Habaue, Shigeki; Murakami, Soichiro; Higashimura, Hideyuki.
Novel oxovanadium(IV)-bisoxazoline catalysts, such as vanadyl sulfate (VOSO4)-(R)-2,2′-isopropylidenebis(4-phenyl-2-oxazoline) [(R)Phbox], for the asym. oxidative coupling polymerization (AOCP) of 2,3-dihydroxynaphthalene were developed. For example, the AOCP with VOSO4-(R)Phbox in CH2Cl2-MeOH [7/1 (volume/volume)] at room temperature for 24 h under an O2 atmosphere, followed by acetylation of the hydroxyl groups, afforded a polymer in a 58% yield with a sp. rotation of [α]D = -147. The enantioselectivity during the polymerization was estimated to be 80% enantiomeric excess (S), a value much higher than that observed for the polymerizations with the copper(I)-based catalyst systems and the typical oxovanadium(IV) catalysts reported for the asym. oxidative coupling producing the 1,1′-bi-2-naphthol derivatives
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