Enantioselective direct, base-free hydrogenation of ketones by a manganese amido complex of a homochiral, unsymmetrical P-N-P’ ligand

2021 ◽  
Author(s):  
Chris S. G. Seo ◽  
Brian Tsz Ho Tsui ◽  
Matthew Viktor Gradiski ◽  
Samantha A. M. Smith ◽  
Robert H Morris
Keyword(s):  
Base Metal ◽  
Metal Catalysts ◽  
Environmentally Benign ◽  
Great Promise ◽  
Homogeneous Hydrogenation ◽  
Hydrogenation Catalysis

The use of manganese in homogeneous hydrogenation catalysis has been a recent focus in the pursuit of more environmentally benign base metal catalysts. It has great promise with its unique...

scholarly journals Base Metal Catalysts for Deoxygenative Reduction of Amides to Amines

Catalysts ◽  
2019 ◽  
Vol 9 (6) ◽  
pp. 490 ◽  
Author(s):  
Andrey Khalimon ◽  
Kristina Gudun ◽  
Davit Hayrapetyan
Keyword(s):  
Base Metal ◽  
Precious Metals ◽  
Building Blocks ◽  
Metal Catalysts ◽  
Environmentally Benign ◽  
Attractive Alternative ◽  
Catalytic Systems ◽  
Amide Carbonyl ◽  
Amide Carbonyl Group ◽  
Metal Catalyzed

The development of efficient methodologies for production of amines attracts significant attention from synthetic chemists, because amines serve as essential building blocks in the synthesis of many pharmaceuticals, natural products, and agrochemicals. In this regard, deoxygenative reduction of amides to amines by means of transition-metal-catalyzed hydrogenation, hydrosilylation, and hydroboration reactions represents an attractive alternative to conventional wasteful techniques based on stoichiometric reductions of the corresponding amides and imines, and reductive amination of aldehydes with metal hydride reagents. The relatively low electrophilicity of the amide carbonyl group makes this transformation more challenging compared to reduction of other carbonyl compounds, and the majority of the reported catalytic systems employ precious metals such as platinum, rhodium, iridium, and ruthenium. Despite the application of more abundant and environmentally benign base metal (Mn, Fe, Co, and Ni) complexes for deoxygenative reduction of amides have been developed to a lesser extent, such catalytic systems are of great importance. This review is focused on the current achievements in the base-metal-catalyzed deoxygenative hydrogenation, hydrosilylation, and hydroboration of amides to amines. Special attention is paid to the design of base metal catalysts and the mechanisms of such catalytic transformations.

Designed pincer ligands supported Co(II)-based catalysts for dehydrogenative activation of alcohols: Studies on N-alkylation of amines, -alkylation of ketones and synthesis of quinolines

2021 ◽  
Author(s):  
Anshu Singh ◽  
Ankur Maji ◽  
Mayank Joshi ◽  
Angshuman Roychoudhury ◽  
Kaushik Ghosh
Keyword(s):  
Base Metal ◽  
Metal Catalysts ◽  
Pincer Ligands ◽  
Activation Of Alcohols

Base-metal catalysts Co1, Co2 and Co3 were synthesized from designed pincer ligands L1, L2 and L3 having NNN donor atoms respectively. Co1, Co2 and Co3 were characterized by IR, UV–Vis....

ChemInform Abstract: Base Metal Catalysts for Photochemical C-H Borylation That Utilize Metal-Metal Cooperativity.

ChemInform ◽  
2014 ◽  
Vol 45 (21) ◽  
pp. no-no
Author(s):  
Thomas J. Mazzacano ◽  
Neal P. Mankad
Keyword(s):  
Base Metal ◽  
Metal Catalysts ◽  
Metal Metal

ChemInform Abstract: Recent Advances on the Design of Group VIII Base-Metal Catalysts with Encapsulated Structures

ChemInform ◽  
2015 ◽  
Vol 46 (39) ◽  
pp. no-no
Author(s):  
Hao Tian ◽  
Xinyu Li ◽  
Liang Zeng ◽  
Jinlong Gong
Keyword(s):  
Base Metal ◽  
Metal Catalysts ◽  
Group Viii ◽  
Recent Advances ◽  
Encapsulated Structures

scholarly journals Studies on Base Metal Catalysts for the Oxidation of Gaseous Ammonia. I.

1925 ◽  
Vol 28 (2) ◽  
pp. 108-119
Author(s):  
Shunichi Uchida
Keyword(s):  
Base Metal ◽  
Metal Catalysts ◽  
Gaseous Ammonia

DMSO-Mediated Synthesis of Methylene-Bridged Unsymmetrical Bisamides in the Presence of AcOH

Synthesis ◽  
2019 ◽  
Vol 52 (02) ◽  
pp. 297-303
Author(s):  
Yi Zhang ◽  
Dongheng Zhou ◽  
Yongmin Ma ◽  
Jing Chen
Keyword(s):  
Acetic Acid ◽  
Transition Metal ◽  
Metal Catalysts ◽  
Dual Role ◽  
Transition Metal Catalysts ◽  
Environmentally Benign ◽  
Efficient Procedure ◽  
Effective Synthesis ◽  
New Strategies

A simple and efficient procedure for the synthesis of N-[(methylthio)methyl]benzamides and methylene-bridged unsymmetrical bisamides was achieved mediated by DMSO in the presence of acetic acid. DMSO plays a dual role in the transformation, as not only a solvent, but also an environmentally benign methylene source. The protocol provides new strategies for effective synthesis of unsymmetrical bisamides and avoids the use of transition-metal catalysts.

Homogeneous Hydrogenation in the Absence of Transition-Metal Catalysts

1964 ◽  
Vol 86 (18) ◽  
pp. 3750-3752 ◽  
Author(s):  
Cheves. Walling ◽  
Laszlo. Bollyky
Keyword(s):  
Transition Metal ◽  
Metal Catalysts ◽  
Transition Metal Catalysts ◽  
Homogeneous Hydrogenation

An Alkaline Water Electrolyzer with Sustainion™ Membranes: 1 A/cm² at 1.9V with Base Metal Catalysts

2017 ◽  
Vol 77 (9) ◽  
pp. 71-73 ◽  
Author(s):  
Zengcai Liu ◽  
Syed D. Sajjad ◽  
Yan Gao ◽  
Jerry Kaczur ◽  
Rich Masel
Keyword(s):  
Base Metal ◽  
Metal Catalysts ◽  
Alkaline Water

Recent Advances in Immobilized Metal Catalysts for Environmentally Benign Oxidation of Alcohols

2008 ◽  
Vol 3 (2) ◽  
pp. 196-214 ◽  
Author(s):  
Tsutomu Matsumoto ◽  
Masaharu Ueno ◽  
Naiwei Wang ◽  
Shū Kobayashi
Keyword(s):  
Metal Catalysts ◽  
Environmentally Benign ◽  
Recent Advances ◽  
Oxidation Of Alcohols
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