scholarly journals Iron/N-doped graphene nano-structured catalysts for general cyclopropanation of olefins

2020 ◽  
Vol 11 (24) ◽  
pp. 6217-6221
Author(s):  
Abhijnan Sarkar ◽  
Dario Formenti ◽  
Francesco Ferretti ◽  
Carsten Kreyenschulte ◽  
Stephan Bartling ◽  
...  
Keyword(s):  
Heterogeneous Catalyst ◽  
Transfer Reaction ◽  
Structured Catalysts ◽  
Homogeneous Domain ◽  
Doped Graphene ◽  
Carbene Transfer

An Fe-based heterogeneous catalyst allows for the synthesis of cyclopropanes via a carbene transfer reaction, a transformation usually belonging to the homogeneous domain.

scholarly journals Heteroleptic nickel(ii)–diNHC complexes and an unusual ‘reverse’ carbene-transfer reaction to silver(i)

2017 ◽  
Vol 46 (34) ◽  
pp. 11318-11326 ◽  
Author(s):  
Han Vinh Huynh ◽  
Christine Hui Min Koh ◽  
Van Ha Nguyen
Keyword(s):  
Transfer Reaction ◽  
Carbene Transfer

An unusual NHC transfer reaction to silver was discovered in the study of heteroleptic nickel dicarbene complexes as aqueous Suzuki–Miyaura catalysts.

Dual Catalysis: Proton/Metal-Catalyzed Tandem Benzofuran Annulation/Carbene Transfer Reaction

2016 ◽  
Vol 18 (6) ◽  
pp. 1322-1325 ◽  
Author(s):  
Jun Ma ◽  
Kai Chen ◽  
Hongguang Fu ◽  
Li Zhang ◽  
Wanqing Wu ◽  
...  
Keyword(s):  
Transfer Reaction ◽  
Carbene Transfer ◽  
Dual Catalysis ◽  
Metal Catalyzed

scholarly journals A fully recyclable heterogenized Cu catalyst for the general carbene transfer reaction in batch and flow

2015 ◽  
Vol 6 (2) ◽  
pp. 1510-1515 ◽  
Author(s):  
Lourdes Maestre ◽  
Erhan Ozkal ◽  
Carles Ayats ◽  
Álvaro Beltrán ◽  
M. Mar Díaz-Requejo ◽  
...  
Keyword(s):  
Transfer Reaction ◽  
Transfer Reactions ◽  
Highly Active ◽  
Cu Catalyst ◽  
Carbene Transfer

Carbene transfer reactions can be performed in batch and flow with a highly active, chemically stable heterogenized tris(triazolyl)methyl copper(i) catalyst.

scholarly journals Facile synthesis of N-doped graphene encapsulated Pd@N/C catalyst and its efficient application in cascade flow synthesis of amines

2021 ◽  
Author(s):  
Jianguo Liu ◽  
Jiangmin Sun ◽  
Yanpei Song ◽  
Shanshan Lin ◽  
Longlong Ma
Keyword(s):  
Heterogeneous Catalyst ◽  
Primary Amine ◽  
Flow Reactor ◽  
Building Blocks ◽  
Primary Amines ◽  
Facile Synthesis ◽  
Flow Synthesis ◽  
Nitrogen Doped ◽  
Doped Graphene ◽  
Excellent Stability

Abstract N-methylamines, as an important class of chemicals, crucial building blocks, have been widely used in pharmaceutical companies and materials synthesis. Transition metal-catalyzed synthesis of N-methylamines, especially the heterogeneous catalyzed N-methylation of amines via different C1 sources has become the most promising methodology, due to the environmentally friendlier process and the recyclable and easily accessible catalysts. However, these reactions generally require activated toxic methyl iodide or dimethyl sulfoxide, and homogeneous catalysts or Raney nickel catalyst. The synthesis of amines still suffering from narrow scopes of amines, harsh reaction conditions, low selectivity of the desired products, and against the requirements of atomic economy and sustainable green environment. Herein, we developed a novel facile synthesis of nitrogen-doped graphene encapsulated Pd@NC nanocatalysts. The resulting heterogeneous catalyst was active for the synthesis of amines (more than 83 examples, yield up to 99%). The nitrogen-doped effect was unlike the previous report that poisoned the metal, it could increase the interaction with the active metal resulting in excellent stability. As far as we know, for the first time, the developed N-doped graphene encapsulated Pd@NC nanocatalyst showed excellent stability and activity of amines synthesis in the 20 times’ recycling test, industrially applicable flow reactor 2880 minutes’ test, and 99% purity of primary amine and tertiary amines product preparation test. Moreover, we have also shown the high atomic economy and environmentally friendlier tandem flow synthesis of N, N-dimethylamine products via the combination of reduction of nitrobenzene and N-methylation of amines, using the single one Pd@NC nanocatalyst with H2O as the only by-product. Upon our knowledge, this is a novel example of primary amine and tertiary amine synthesis methodology with the combined cascade reaction and flow process of nitrobenzene reduction and primary amines N-methylation with a single heterogeneous catalyst.

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