作者:Alain Grandbois、Marie-Ève Mayer、Marion Bédard、Shawn K. Collins、Typhène Michel
DOI:10.1002/chem.200901295
日期:2009.9.28
Fucntionalizing BINOL: Bis‐NHCCu complexes can be used for the oxidative coupling of 2‐naphthols. Product yields are highest when using electron‐deficient 2‐naphthols. Mixed couplings between electron‐rich and electron‐poor 2‐naphthols can be conducted to give good yields of the mixed products.
Highly selective oxidative cross-coupling of differently substituted 2-naphthols mediated by Cu(II)-tert-butyl amine complexes is described. The “cross”-products are obtained in good to excellent yields and the selectivity up to ⪢90% is observed depending on the substitution of naphthol nuclei. The alternative procedures - the cross-coupling of free naphthols with CuCl(OMe) as well as the coupling