General and selective synthesis of primary amines using Ni-based homogeneous catalysts,Chemical Science

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General and selective synthesis of primary amines using Ni-based homogeneous catalysts
Chemical Science ( IF 7.6 ) Pub Date : 2020-03-25 , DOI: 10.1039/d0sc01084g
Kathiravan Murugesan _{1,

2,

3} , Zhihong Wei _{1,

2,

3} , Vishwas G. Chandrashekhar _{1,

2,

3} , Haijun Jiao _{1,

2,

3} , Matthias Beller _{1,

2,

3} , Rajenahally V. Jagadeesh _{1,

2,

3}

Affiliation

The development of base metal catalysts for industrially relevant amination and hydrogenation reactions by applying abundant and atom economical reagents continues to be important for the cost-effective and sustainable synthesis of amines which represent highly essential chemicals. In particular, the synthesis of primary amines is of central importance because these compounds serve as key precursors and central intermediates to produce value-added fine and bulk chemicals as well as pharmaceuticals, agrochemicals and materials. Here we report a Ni-triphos complex as the first Ni-based homogeneous catalyst for both reductive amination of carbonyl compounds with ammonia and hydrogenation of nitroarenes to prepare all kinds of primary amines. Remarkably, this Ni-complex enabled the synthesis of functionalized and structurally diverse benzylic, heterocyclic and aliphatic linear and branched primary amines as well as aromatic primary amines starting from inexpensive and easily accessible carbonyl compounds (aldehydes and ketones) and nitroarenes using ammonia and molecular hydrogen. This Ni-catalyzed reductive amination methodology has been applied for the amination of more complex pharmaceuticals and steroid derivatives. Detailed DFT computations have been performed for the Ni-triphos based reductive amination reaction, and they revealed that the overall reaction has an inner-sphere mechanism with H₂ metathesis as the rate-determining step.

中文翻译：

使用镍基均相催化剂的通用和选择性合成伯胺

通过应用丰富且原子经济的试剂来开发用于工业上相关的胺化和氢化反应的贱金属催化剂，对于经济高效且可持续地合成代表非常重要的化学物质的胺而言，仍然至关重要。尤其是，伯胺的合成至关重要，因为这些化合物用作生产增值精细化学品和散装化学品以及药品，农用化学品和原料的关键前体和主要中间体。在这里，我们报道了一种Ni-triphos络合物，它是第一个用于镍的羰基化合物与氨的还原胺化和硝基芳烃加氢制备各种伯胺的Ni基均相催化剂。值得注意的是，这种镍配合物可以合成功能化且结构多样的苄基，杂环和脂肪族直链和支链伯胺以及芳香族伯胺，是使用氨和分子氢从廉价且易于获得的羰基化合物（醛和酮）和硝基芳烃开始的。这种镍催化的还原胺化方法已用于胺化更复杂的药物和类固醇衍生物。已经对基于Ni-triphos的还原胺化反应进行了详细的DFT计算，结果表明整个反应具有H的内球机理。这种镍催化的还原胺化方法已用于胺化更复杂的药物和类固醇衍生物。已经对基于Ni-triphos的还原胺化反应进行了详细的DFT计算，结果表明整个反应具有H的内球机理。这种镍催化的还原胺化方法已用于胺化更复杂的药物和类固醇衍生物。已经对基于Ni-triphos的还原胺化反应进行了详细的DFT计算，结果表明整个反应具有H的内球机理。₂复分解是决定速率的步骤。

更新日期：2020-03-25

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