Environmentally friendly synthesis of secondary amines via one-pot reductive amination over a heterogeneous Co–Nx catalyst

2017 ◽  
Vol 41 (20) ◽  
pp. 11991-11997 ◽  
Author(s):  
Liang Jiang ◽  
Peng Zhou ◽  
Zehui Zhang ◽  
Quan Chi ◽  
Shiwei Jin
Keyword(s):  
Transition Metal ◽  
Reductive Amination ◽  
Environmentally Friendly ◽  
Metal Catalysts ◽  
Transition Metal Catalysts ◽  
Secondary Amines ◽  
Selective Synthesis ◽  
One Pot ◽  
Earth Abundant

The application of earth-abundant transition metal catalysts in the mild and selective synthesis of secondary amines via the reductive amination method is very challenging.

scholarly journals Water oxidation using earth-abundant transition metal catalysts: opportunities and challenges

2016 ◽  
Vol 45 (37) ◽  
pp. 14421-14461 ◽  
Author(s):  
Markus D. Kärkäs ◽  
Björn Åkermark
Keyword(s):  
Transition Metal ◽  
Solar Energy ◽  
Water Oxidation ◽  
Metal Catalysts ◽  
Transition Metal Catalysts ◽  
Oxidation Catalysts ◽  
Fuel Conversion ◽  
Earth Abundant ◽  
Vital Component ◽  
Conversion Technologies

Catalysts for the oxidation of water are a vital component of solar energy to fuel conversion technologies. This Perspective summarizes recent advances in the field of designing homogeneous water oxidation catalysts (WOCs) based on Mn, Fe, Co and Cu.

Indium(III)-Catalyzed Transformations of Alkynes: Recent Advances in Carbo- and Heterocyclization Reactions

Synthesis ◽  
2017 ◽  
Vol 49 (22) ◽  
pp. 4931-4941 ◽  
Author(s):  
Nicklas Selander ◽  
Stalin Pathipati ◽  
Angela van der Werf
Keyword(s):  
Transition Metal ◽  
Environmentally Friendly ◽  
Short Review ◽  
Metal Catalysts ◽  
Transition Metal Catalysts ◽  
Nucleophilic Additions ◽  
Terminal Alkynes ◽  
Cyclization Reactions ◽  
Recent Advances

The use of a well-chosen catalyst is instrumental for the development of more efficient, economical and environmentally friendly reactions. In recent decades, indium-based catalysts have proven to be competitive and useful alternatives to transition-metal catalysts such as silver and gold. In this short review, we present some of the recent advances in indium(III)-catalyzed transformations of alkynes, with a focus on cyclization reactions.1 Introduction2 Terminal Alkynes as Nucleophiles3 Nucleophilic Additions to Alkynes4 Carbo- and Heterocyclization Reactions4.1 Carbocyclization4.2 Oxygen-Based Heterocycles4.3 Nitrogen-Based Heterocycles4.4 Sulfur-Based Heterocycles5 Conclusion

scholarly journals n-Alkanes to n-alcohols: Formal primary C─H bond hydroxymethylation via quadruple relay catalysis

2020 ◽  
Vol 6 (47) ◽  
pp. eabc6688
Author(s):  
Xinxin Tang ◽  
Lan Gan ◽  
Xin Zhang ◽  
Zheng Huang
Keyword(s):  
Transition Metal ◽  
Transition Metal Catalysts ◽  
Selective Synthesis ◽  
Chemical Transformations ◽  
One Pot ◽  
Olefin Isomerization ◽  
Discrete Transition ◽  
Potential Applicability ◽  
Molecular Catalysts

Nature is able to synergistically combine multiple enzymes to conduct well-ordered biosynthetic transformations. Mimicking nature’s multicatalysis in vitro may give rise to new chemical transformations via interplay of numerous molecular catalysts in one pot. The direct and selective conversion of abundant n-alkanes to valuable n-alcohols is a reaction with enormous potential applicability but has remained an unreached goal. Here, we show that a quadruple relay catalysis system involving three discrete transition metal catalysts enables selective synthesis of n-alcohols via n-alkane primary C─H bond hydroxymethylation. This one-pot multicatalysis system is composed of Ir-catalyzed alkane dehydrogenation, Rh-catalyzed olefin isomerization and hydroformylation, and Ru-catalyzed aldehyde hydrogenation. This system is further applied to synthesis of α,ω-diols from simple α-olefins through terminal-selective hydroxymethylation of silyl alkanes.

scholarly journals Earth-Abundant 3d Transition Metal Catalysts for Hydroalkoxylation and Hydroamination of Unactivated Alkenes

Catalysts ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 674
Author(s):  
Lou Rocard ◽  
Donghuang Chen ◽  
Adrien Stadler ◽  
Hailong Zhang ◽  
Richard Gil ◽  
...  
Keyword(s):  
Transition Metal ◽  
Relevant Literature ◽  
Bond Formation ◽  
Metal Catalysts ◽  
Transition Metal Catalysts ◽  
Iron Cobalt ◽  
Cobalt Nickel ◽  
Copper And Zinc ◽  
Nickel Copper ◽  
Earth Abundant

This review summarizes the most noteworthy achievements in the field of C–O and C–N bond formation by hydroalkoxylation and hydroamination reactions on unactivated alkenes (including 1,2- and 1,3-dienes) promoted by earth-abundant 3d transition metal catalysts based on manganese, iron, cobalt, nickel, copper and zinc. The relevant literature from 2012 until early 2021 has been covered.

scholarly journals One-pot synthesis of propynoates and propynenitriles

2017 ◽  
Vol 95 (2) ◽  
pp. 144-148 ◽  
Author(s):  
Fan Shu ◽  
Qingjuan Zheng ◽  
Wanrong Dong ◽  
Zhihong Peng ◽  
Delie An
Keyword(s):  
Low Temperature ◽  
Transition Metal ◽  
Functional Group ◽  
High Efficiency ◽  
Metal Catalysts ◽  
Transition Metal Catalysts ◽  
One Pot ◽  
Efficient Transformation ◽  
One Pot Synthesis ◽  
Substituted Acetylenes

An efficient transformation towards propynoates and propynenitriles is herein described. The practical methodology was conducted at low temperature (–78 or –60 °C) in a one-pot manner with the assistance of base rather than any transition metal catalysts. The base-induced protocol exhibits good functional group tolerance (up to 28 examples) and high efficiency (up to 92% yields) towards substituted acetylenes of great synthetic significance, which was also well demonstrated by the gram-scale reactions.

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