alkylation, and trifluoromethanesulfonic acid (triflic acid, TfOH) was also a good catalyst. The catalytic activity of metal triflates and TfOH increased in the order La(OTf)3 < Yb(OTf)3 < TfOH < Sc(OTf)3 < Hf(OTf)4. A mechanistic study was also performed. The reaction of 1-phenylethanol (4a) in the presence of Sc(OTf)3 in nitromethane gave an equilibrium mixture of 4a and bis(1-phenylethyl) ether (54). Addition
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
Synthesis of Polysubstituted 2‐Naphthols by Palladium‐Catalyzed Intramolecular Arylation/Aromatization Cascade
作者:Jinhui Cai、Zhen‐Kai Wang、Yun‐Hao Zhang、Fei Yao、Xu‐Dong Hu、Wen‐Bo Liu
DOI:10.1002/adsc.201901573
日期:2020.3.17
A palladium‐catalyzed intramolecular α‐arylation and defluorinative aromatization strategy for the synthesis of polysubstituted 2‐naphthols is reported. With ortho‐bromobenzyl‐substituted α‐fluoroketones as the substrates and palladium acetate/triphenylphosphine as the catalyst, this method features good functional group tolerance, readily available catalyst and starting materials, and high yields
报道了钯催化的分子内α-芳基化和脱氟芳构化策略,用于合成多取代的2-萘酚。该方法以邻溴苄基取代的α-氟酮为底物,并以乙酸钯/三苯膦为催化剂,具有良好的官能团耐受性,易于获得的催化剂和起始原料以及高收率的特点。该策略的应用通过合成有用的结构单元(例如,石脑油[2,3- b ]呋喃,萘酚AS-D和配体/催化剂)得到证明。
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.