Highly Efficient Rh(I) Homo- and Heterogeneous Catalysts for C–N Couplings via Hydrogen Borrowing
作者:Chin M. Wong、Matthew B. Peterson、Indrek Pernik、Roy T. McBurney、Barbara A. Messerle
DOI:10.1021/acs.inorgchem.7b02586
日期:2017.12.4
explored as catalysts for the hydrogenborrowing reactions of amines and alcohols. Bidentate carbene-triazole ligands were readily synthesized via “click” reactions which allowed a diversity of ligand backbones to be accessed. The catalytic transformations are highly efficient, able to reach completion in under 6 h, and promote C–N bond formation across a range of primary alcohol and amine substrates. Moreover
One-pot chemoselective reductive alkylation of nitroarenes: A new general method of synthesis of alkylanilines
作者:Giuseppe Bartoli、Marcella Bosco、Renato Dal Pozzo、Marino Petrini
DOI:10.1016/s0040-4020(01)83464-5
日期:1987.1
A New facile and general synthesis of alkylanilines by one-pot reductive alkylation of nitroarenes is reported. This method is based on the “in situ” reduction by hydrides (LiAlH4 or NaBH4) in the presence of catalytic amounts of PdC, of nitronate adducts arising from the conjugate addition of Grignard reagents to mononitroarenes. LiAlH4 showed to be a more efficient but less selective reducing agent
Aza-Matteson Reactions via Controlled Mono- and Double-Methylene Insertions into Nitrogen–Boron Bonds
作者:Qiqiang Xie、Guangbin Dong
DOI:10.1021/jacs.1c06186
日期:2021.9.15
Boron-homologation reactions represent an efficient and programmable approach to prepare alkylboronates, which are valuable and versatile synthetic intermediates. The typical boron-homologation reaction, also known as the Matteson reaction, involves formal carbenoid insertions into C–B bonds. Here we report the development of aza-Matteson reactions via carbenoid insertions into the N–B bonds of aminoboranes
develop an efficient and workable method for the reduction of imines via hydroboration with HBpin. The low cost and non-toxic Fe exhibits high catalytic activity to this hydroboration. A large range of aldimines comprising diverse aryl groups, alkyl groups and heterocycles proceed the hydroboration well to yield secondary amines in good to excellent yields. Kinetic mechanistic studies indicate the importance
我们开发了一种有效且可行的方法,用于通过 HBpin 硼氢化还原亚胺。低成本且无毒的Fe对这种硼氢化反应具有高催化活性。包含不同芳基、烷基和杂环的大范围醛亚胺可以很好地进行硼氢化,以良好至极好的产率产生仲胺。动力学机制研究表明 Fe 在 HBpin 转化为活性物质中的重要性。通过该策略制备几种市售药物突出了其在药物化学中的潜在应用。