Methylation of Arenols through Ni-catalyzed C-O Activation with Methyl Magnesium Bromide
作者:Wen-Juan Shi、Zhang-Jie Shi
DOI:10.1002/cjoc.201700664
日期:2018.3
Direct alkylation of arenols with alkyl organometallic reagents has never been approached. Herein we reported the first successful example of nickel‐catalyzed methylation of arenols with methyl Grignard reagents to construct C(sp2)‐C(sp3) bond under mild conditions. The transformation was compatible with broad substrate scope of 2‐naphthol derivatives. Benzyl alcohol and biphenols were also suitable
Practical Cross-Coupling between O-Based Electrophiles and Aryl Bromides via Ni Catalysis
作者:Zhi-Chao Cao、Qin-Yu Luo、Zhang-Jie Shi
DOI:10.1021/acs.orglett.6b02656
日期:2016.12.2
Cross-coupling of various O-based electrophiles with aryl bromides was developed through Ni-catalyzed C–O activation in the presence of magnesium. Beside carboxylates, carbamates, and ethers, phenols exhibited excellent reactivity under modified conditions. This chemistry was featured as a simple and environmentally benign process with low catalyst loading and easy manipulations. The method exhibited
Enantioselective Oxidative Homocoupling and Cross-Coupling of 2-Naphthols Catalyzed by Chiral Iron Phosphate Complexes
作者:Sachin Narute、Regev Parnes、F. Dean Toste、Doron Pappo
DOI:10.1021/jacs.6b11198
日期:2016.12.21
Novel chiral ironphosphatecomplexes were prepared as catalysts for asymmetric oxidative coupling reactions. These catalysts were applied for the synthesis of enantio-enriched C1- and C2-symmetric BINOLs, in which the 3 and 3' positions are available for chemical modifications. It was proposed that the reaction takes place via an oxidative radical-anion coupling mechanism. A destructive BINOL racemization
1-(Aralkyl)-2-naphthols are prepared by reacting a 2-naphthol with a styrene in the presence of a carboxylic acid. The 1-(aralkyl)-2-naphthols obtainable by the process according to the invention are valuable starting materials for the preparation of dyes, pest control agents, drugs, ointments, emulsifiers, dispersants, stabilizers, hydraulic fluids, plasticizers, corrosion inhibitors, disinfectants, crop protection agents and scents.