Children learn through play, and they learn more than adults might expect. Science experiments are a great way to spark their curiosity, get their minds active, and encourage them to do something that doesn¡¯t involve a screen. 4488-22-6, C20H16N2. A document type is Article, introducing its new discovery., COA of Formula: C20H16N2
Selective Cross-Coupling of 2-Naphthol and 2-Naphthylamine Derivatives. A Facile Synthesis of 2,2′,3-Trisubstituted and 2,2′,3,3′-Tetrasubstituted 1,1′-Binaphthyls
The novel 1,1′-binaphthyls with OH and/or NHR (R = H or Ph) groups in the 2,2′-positions and with additional methoxycarbonyl group(s) in the 3- or 3,3′-positions (13-18) have been synthesized from their respective precursors 1-5 by the CuCl2/t-BuNH2-mediated oxidative cross-coupling.In most cases, the chemoselectivity was good, and the cross-coupled products 11-18 were obtained in fair to excellent yields.Binaphthyls 6-10, resulting from the selfcoupling, and carbazoles 19-23 have been identified as byproducts.Ab initio calculations and electrochemical measurements have been employed to account for the observrd selectivity.
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Reference£º
Chiral Catalysts,
Chiral catalysts – SlideShare