challenging direct asymmetric catalytic aerobicoxidativecross‐coupling of 2‐naphthylamine and 2‐naphthol, using a novel CuI/SPDO system, has been successfully developed for the first time. Enantioenriched 3,3′‐disubstituted NOBINs were achieved and could be readily derived to divergent chiral ligands and catalysts. This reaction features high enantioselectivities (up to 96 % ee) and good yields (up to
首次成功开发了具有挑战性的2-萘胺和2-萘酚的直接不对称催化好氧氧化交叉偶联,使用新型Cu I / SPDO系统。获得了对映体富集的3,3'-双取代NOBIN,可以很容易地衍生出不同的手性配体和催化剂。该反应具有高对映选择性(高达96%ee)和良好的产率(高达80%)。在DFT计算表明,CF之间在F-H相互作用3的L17和2-萘酚的H-1,8,和两个联接伙伴之间的π-π堆叠可以在这个交叉偶联反应的enantiocontrol起到至关重要的作用。
Jadhav; Rao, Proceedings - Indian Academy of Sciences, Section A, 1946, vol. 23, p. 215,216,217
作者:Jadhav、Rao
DOI:——
日期:——
Enantioselective Oxidative Coupling of 2-Naphthol Derivatives by Copper-(<i>R</i>)-1,1′-Binaphthyl-2,2′-diamine-TEMPO Catalyst
AbstractAn efficient chiral copper catalytic system [(R)‐(+)‐1,1′‐binaphthyl‐2,2′‐diamine‐copper(I) chloride‐TEMPO] for the asymmetric oxidative coupling of 2‐naphthol derivatives to synthesize enantiomerically enriched BINOL derivatives has been developed with good to excellent enantiomeric excess (up to 97% ee). The addition of a catalytic quantity of 2,2,6,6‐tetramethylpiperidin‐1‐yl oxyl (TEMPO) to the copper‐(R)‐(+)‐1,1′‐binaphthyl‐2,2′‐diamine complex greatly enhanced the reactivity and enantioselectivity of the enantioselective oxidative coupling of 2‐naphthol derivatives and also reduced the reaction temperature from 90 °C to room temperature in dichloromethane solvent.magnified image