scholarly journals Direct Reductive Amination of Carbonyl Compounds with H2Using Heterogeneous Catalysts in Continuous Flow as an Alternative to N-Alkylation with Alkyl Halides

2018 ◽  
Vol 360 (24) ◽  
pp. 4699-4704 ◽  
Author(s):  
Benjamin Laroche ◽  
Haruro Ishitani ◽  
Shū Kobayashi
Keyword(s):  
Carbonyl Compounds ◽  
Continuous Flow ◽  
Heterogeneous Catalysts ◽  
Reductive Amination ◽  
Alkyl Halides

CuI nanoparticles as recyclable heterogeneous catalysts for C–N bond formation reactions

2017 ◽  
Vol 7 (13) ◽  
pp. 2857-2864 ◽  
Author(s):  
Manoranjan Kumar ◽  
Vinod Bhatt ◽  
Onkar S. Nayal ◽  
Sushila Sharma ◽  
Vishal Kumar ◽  
...  
Keyword(s):  
Carbonyl Compounds ◽  
Heterogeneous Catalysts ◽  
Reductive Amination ◽  
Bond Formation ◽  
Copper Iodide ◽  
First Time ◽  
Bond Formation Reactions

Herein, copper iodide nanoparticles (NPs) are reported for the reductive amination of carbonyl compounds for the first time.

scholarly journals C-N Bond Formation by Consecutive Continuous-Flow Reductions towards A Medicinally Relevant Piperazine Derivative

Molecules ◽  
2021 ◽  
Vol 26 (7) ◽  
pp. 2040
Author(s):  
Zsolt Fülöp ◽  
Péter Bana ◽  
István Greiner ◽  
János Éles
Keyword(s):  
Antipsychotic Drug ◽  
Catalytic Hydrogenation ◽  
Continuous Flow ◽  
Reductive Amination ◽  
Reduction Method ◽  
Bond Formation ◽  
Aluminum Salt ◽  
Line Extraction ◽  
Piperazine Derivative ◽  
Step Procedure

A new, continuous-flow consecutive reduction method was developed for the C-N bond formation in the synthesis of the key intermediate of the antipsychotic drug cariprazine. The two-step procedure consists of a DIBAL-H mediated selective ester reduction conducted in a novel, miniature alternating diameter reactor, followed by reductive amination using catalytic hydrogenation on 5% Pt/C. The connection of the optimized modules was accomplished using an at-line extraction to prevent precipitation of the aluminum salt byproducts.

scholarly journals Copper(I) Chloride/Kieselguhr: A Versatile Catalyst for Oxidation of Alkyl Halides and Alkyl Tosylates to the Carbonyl Compounds

1999 ◽  
Vol 23 (7) ◽  
pp. 434-435
Author(s):  
Mohammed M. Hashemi ◽  
Yousef Ahmadi Beni
Keyword(s):  
Carbonyl Compounds ◽  
Alkyl Halides ◽  
Aldehydes And Ketones ◽  
High Yields

Copper(I) Chloride adsorbed on Kieselguhr in the presence of oxygen catalyses oxidation of alkyl halides and alkyl tosylates to the aldehydes and ketones in high yields.

scholarly journals Facile Synthesis of COF-Supported Reduced Pd-Based Catalyst for One-Pot Reductive Amination of Aldehydes

Catalysts ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 287
Author(s):  
Jianguo Liu ◽  
Mingyue Zhang ◽  
Longlong Ma
Keyword(s):  
Heterogeneous Catalysts ◽  
Reductive Amination ◽  
Secondary Amines ◽  
Metallic State ◽  
One Pot ◽  
Effective Synthesis ◽  
Pharmaceutical Industries ◽  
The One ◽  
Heterocyclic Aldehydes ◽  
Supported Pd

Dibenzylamine motifs are an important class of crucial organic compounds and are widely used in fine chemical and pharmaceutical industries. The development of the efficient, economical, and environmentally friendly synthesis of amines using transition metal-based heterogeneous catalysts remains both desirable and challenging. Herein, we prepared the covalent organic framework (COF)-supported heterogeneous reduced COF-supported Pd-based catalyst and used it for the one-pot reductive amination of aldehydes. There are both Pd metallic state and oxidated Pdσ+ in the catalysts. Furthermore, in the presence of the reduced COF-supported Pd-based catalyst, many aromatic, aliphatic, and heterocyclic aldehydes with various functional groups substituted were converted to their corresponding amines products in good to excellent selectivity (up to 91%) under mild reaction conditions (70 °C, 2 h, NH3, 20 bar H2). This work expands the covalent organic frameworks for the material family and its support catalyst, opening up new catalytic applications in the economical, practical, and effective synthesis of secondary amines.

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