Enantioselective Oxidative Biaryl Coupling Reactions Catalyzed by 1,5-Diazadecalin Metal Complexes: Efficient Formation of Chiral Functionalized BINOL Derivatives
作者:Xiaolin Li、J. Brian Hewgley、Carol A. Mulrooney、Jaemoon Yang、Marisa C. Kozlowski
DOI:10.1021/jo0340206
日期:2003.7.1
ligands in the enantioselectiveoxidative biaryl coupling of substituted 2-naphtholderivatives. Under the optimal conditions employing 2.5-10 mol % of a 1,5-diaza-cis-decalin copper(II) catalyst with oxygen as the oxidant, enantioselectivecouplings (44-96% ee) could be achieved for a range of 3-substituted 2-naphthols including the ester, ketone, phosphonyl, and sulfonyl derivatives. The relationship
Highly selective oxidative cross-coupling of 2-naphthol derivatives with chiral copper(I)–bisoxazoline catalysts
作者:Tomohisa Temma、Shigeki Habaue
DOI:10.1016/j.tetlet.2005.06.098
日期:2005.8
The asymmetric oxidativecoupling reaction of 3-hydroxy-2-naphthoate and 2-naphtholderivatives with the CuCl–(S)-(−)-2,2′-isopropylidenebis(4-phenyl-2-oxazoline) catalyst under an O2 atmosphere was carried out. The reaction proceeded in a highly cross-coupling selective manner (⩽99.7%) with a moderate enantioselectivity of up to 65%.
In-depth structure–selectivity investigations on asymmetric, copper-catalyzed oxidative biaryl coupling in the presence of 5-cis-substituted prolinamines
Asymmetric aerobic oxidative coupling of 3-hydroxy-2-naphthoate with a copper complex prepared in situ from chiral diamine 3 and cuprous chloride as catalyst afforded binaphtholderivatives in good enantioselectivities up to 73% ee.
Enantioselective Synthesis of Binaphthol Derivatives by Oxidative Coupling of Naphthol Derivatives Catalyzed by Chiral Diamine·Copper Complexes
作者:Makoto Nakajima、Irie Miyoshi、Kumiko Kanayama、Shun-ichi Hashimoto、Masahiro Noji、Kenji Koga
DOI:10.1021/jo981808t
日期:1999.4.1
A highly efficient process of aerobic oxidative coupling of 2-naphthol derivatives catalyzed by 1 mol % of Cu(OH)Cl.TMEDA has been developed, Enantioselective oxidative coupling of naphthols was achieved by the use of 10 mol % of chiral catalysts prepared from proline-derived diamines and cuprous chloride, affording the corresponding binaphthols in good enantioselectivities of up to 78% ee. The ester moiety at the 3-position of the substrate was found to be essential for the good asymmetric induction observed in the present coupling reaction.