Application In Synthesis of (S)-3,3′-Dibromo-1,1′-bi-2-naphthol. The reaction of aromatic heterocyclic molecules with protons is called protonation. Aromatic heterocycles are more basic than benzene due to the participation of heteroatoms. Compound: (S)-3,3′-Dibromo-1,1′-bi-2-naphthol, is researched, Molecular C20H12Br2O2, CAS is 119707-74-3, about Highly efficient enantioselective epoxidation of α,β-enones catalyzed by cheap chiral lanthanum and gadolinium alkoxides. Author is Chen, Ruifang; Qian, Changtao; de Vries, Johannes G..
(S)-6,6′-Dibromo-BINOL and (S)-6,6′-diphenyl-BINOL have been developed as efficient chiral ligands applicable to lanthanoid catalyzed asym. epoxidation of α,β-unsaturated ketones in the presence of cumene hydroperoxide. Excellent chem. yield and enantioselectivity have been achieved for several epoxides, e.g., I, at room temperature by using 5 mol% of La(O-i-Pr)3-(S)-6,6′-dibromo-BINOL and Gd(O-i-Pr)3-(S)-6,6′-diphenyl-BINOL, resp. Up to 95% ee was obtained for epoxychalcone with Gd(O-i-Pr)3-(S)-6,6-diphenyl-BINOL catalyst at room temperature A plausible catalyst structure as well as the catalytic cycle has also been suggested.
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Bromide – Wikipedia,
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