Nickel-Catalyzed Amination of Aryl Sulfamates and Carbamates Using an Air-Stable Precatalyst
作者:Liana Hie、Stephen D. Ramgren、Tehetena Mesganaw、Neil K. Garg
DOI:10.1021/ol301847m
日期:2012.8.17
A facile nickel-catalyzed method to achieve the amination of synthetically useful arylsulfamates and carbamates is reported. Contrary to most Ni-catalyzed amination reactions, this user-friendly approach relies on an air-stable Ni(II) precatalyst, which, when employed with a mild reducing agent, efficiently delivers aminated products in good to excellent yields. The scope of the method is broad with
报道了一种简便的镍催化方法来实现合成有用的氨基磺酸芳基酯和氨基甲酸酯的胺化。与大多数 Ni 催化的胺化反应相反,这种用户友好的方法依赖于空气稳定的 Ni(II) 预催化剂,当它与温和的还原剂一起使用时,可以有效地以良好到优异的产率提供胺化产物。该方法的范围就两个偶联伙伴而言都是广泛的,并且包括杂环底物。
Amination of Aryl Alcohol Derivatives
申请人:Garg Neil K.
公开号:US20130289270A1
公开(公告)日:2013-10-31
Embodiments of the invention provide methods and materials for chemical cross-coupling reactions that utilize aryl alcohol derivatives as cross-coupling partners. Embodiments of the invention include methods for the amination of aryl sulfamates and carbamates, which are attractive cross-coupling partners, particularly for use in multistep synthesis. Illustrative embodiments include versatile means to use simple derivatives of phenol as precursors to polysubstituted aryl amines, as exemplified by a concise synthesis of the antibacterial drug linezolid.
N,B-Bidentate Boryl Ligand-Supported Iridium Catalyst for Efficient Functional-Group-Directed C–H Borylation
作者:Guanghui Wang、Li Liu、Hong Wang、You-Song Ding、Jing Zhou、Shuai Mao、Pengfei Li
DOI:10.1021/jacs.6b11867
日期:2017.1.11
Convenient silylborane precursors for introducing N,B-bidentate boryl ligands onto transition metals were designed, prepared, and employed in ready formation of irdium(III) complexes via Si-B oxidative addition. A practical, efficient catalytic ortho-borylation reaction of arenes with a broad range of directing groups was developed using an in situ generated catalyst from the silylborane preligand 3c and [IrCl(COD)](2).
<i>Ortho</i>- and <i>Para</i>-Selective Ruthenium-Catalyzed C(sp<sup>2</sup>)–H Oxygenations of Phenol Derivatives
作者:Weiping Liu、Lutz Ackermann
DOI:10.1021/ol401535k
日期:2013.7.5
Versatile ruthenium catalysts allowed for efficient direct oxygenations of aryl carbamates under remarkably mild reaction conditions. In addition to chelation-assisted C-H activation, the optimized ruthenium catalyst proved amenable to para-selective hydroxylations of anisoles without Lewis basic directing groups.