Catalytic asymmetric hydrogenation reaction by in situ formed ultra-fine metal nanoparticles in live thermophilic hydrogen-producing bacteria

Nanoscale ◽  
2021 ◽  
Author(s):  
Wei Bing ◽  
Faming Wang ◽  
Yuhuan Sun ◽  
Jinsong Ren ◽  
Xiaogang Qu
Keyword(s):  
Metal Nanoparticles ◽  
Catalytic Hydrogenation ◽  
Asymmetric Hydrogenation ◽  
Environmentally Friendly ◽  
Hydrogenation Reaction ◽  
Highly Efficient ◽  
Hydrogenation Reactions ◽  
Live Bacteria ◽  
Catalytic Asymmetric Hydrogenation

An environmentally friendly biomimetic strategy has been presented and validated for the catalytic hydrogenation reaction in live bacteria. In situ formed ultra-fine metal nanoparticles can realize highly efficient asymmetric hydrogenation reactions.

Enantioselective Catalytic Methods for the Elaboration of Chiral Tetrahydro-β-carbolines and Related Scaffolds

Synthesis ◽  
2017 ◽  
Vol 49 (12) ◽  
pp. 2605-2620 ◽  
Author(s):  
Nicolas Glinsky-Olivier ◽  
Xavier Guinchard
Keyword(s):  
Kinetic Resolution ◽  
Asymmetric Reduction ◽  
Asymmetric Hydrogenation ◽  
Transfer Hydrogenation ◽  
Chiral Molecules ◽  
Chiral Phosphoric Acid ◽  
Hydrogenation Reactions ◽  
Synthetic Intermediates ◽  
Catalyzed Reactions

Tetrahydro-β-carbolines are important synthetic intermediates in the total synthesis of natural products and of compounds exhibiting strong bioactivities. Over the last decades, catalytic methods using chiral catalysts have been described for their synthesis. This review covers catalytic and enantioselective methods to access chiral tetrahydro-β-carbolines and their applications in the elaboration of complex chiral molecules.1 Introduction2 Asymmetric Reduction of Dihydro-β-carbolines2.1 Asymmetric Transfer Hydrogenation Reactions2.2 Asymmetric Hydrogenation Reactions2.3 Biocatalyzed Reduction of Dihydro-β-carbolines3 Organocatalyzed Pictet–Spengler Reactions3.1 Chiral Thiourea-Catalyzed Reactions3.2 Chiral Phosphoric Acid Catalyzed Reactions4 Pictet–Spengler Reactions of In Situ Generated Cyclic Iminiums5 Organocatalyzed Functionalization of Dihydro-β-carboliniums6 Organocatalyzed Alkylation of Tetrahydro-β-carbolines7 Biocatalyzed Dynamic Kinetic Resolution of Tetrahydro-β-carbolines8 Conclusion and Perspectives

In situ growth of metal nanoparticles on boron nitride nanosheets as highly efficient catalysts

2016 ◽  
Vol 4 (48) ◽  
pp. 19107-19115 ◽  
Author(s):  
Li Fu ◽  
Guoxin Chen ◽  
Nan Jiang ◽  
Jinhong Yu ◽  
Cheng-Te Lin ◽  
...  
Keyword(s):  
Boron Nitride ◽  
Metal Nanoparticles ◽  
Room Temperature ◽  
Reducing Agent ◽  
Metal Nanoparticle ◽  
In Situ Growth ◽  
Boron Nitride Nanosheets ◽  
Highly Efficient ◽  
Boron Nitride Nanosheet

We report a facile and general approach for the synthesis of boron nitride nanosheet (BNNS)–metal nanoparticle (NP) composites at room temperature without adding any reducing agent.

scholarly journals Mesoporous Silica Nanosheets with Tunable Pore Lengths Supporting Metal Nanoparticles for Enhanced Hydrogenation Reactions

Catalysts ◽  
2019 ◽  
Vol 10 (1) ◽  
pp. 12 ◽  
Author(s):  
Xiaohui Wang ◽  
Xin Ding ◽  
Houbing Zou
Keyword(s):  
Electron Microscopy ◽  
Mesoporous Silica ◽  
Metal Nanoparticles ◽  
Hydrogenation Reaction ◽  
Silica Layer ◽  
Active Components ◽  
Short Channel ◽  
Wide Range ◽  
Hydrogenation Reactions ◽  
Channel Lengths

The channel lengths of mesoporous materials have a crucial impact on the catalytic performances of as-loaded active components. However, it remains a challenge to precisely tune the mesochannel length in a wide range from ≤50 nm to 200 nm. In this paper, we developed a top-down strategy, that is to say, crushing hollow microspheres, for preparing mesoporous silica nanosheets (MSSs) with perpendicular mesochannels and tunable thicknesses. Owing to the heterogeneous growth of the mesoporous silica layer on the surfaces of polystyrene microspheres (hard template), it was achieved to regulate the mesochannel length continuously in the range of 20–200 nm. The obtained materials were characterized by X-ray diffraction (XRD), nitrogen sorption, scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The effect of channel lengths on the catalytic activity of metal nanoparticles was then investigated in the selective hydrogenation reaction of nitroarenes. It was found that a short channel not only favored dispersing metal nanoparticles uniformly and then avoiding pore blocking, but also improved the accessibility of metal nanoparticles largely during reactions.

Ultra-small Mo2N on SBA-15 as a highly efficient promoter of low-loading Pd for catalytic hydrogenation

Nanoscale ◽  
2018 ◽  
Vol 10 (47) ◽  
pp. 22348-22356 ◽  
Author(s):  
Xusheng Cheng ◽  
Dongxu Wang ◽  
Jiancong Liu ◽  
Xin Kang ◽  
Haijing Yan ◽  
...  
Keyword(s):  
Catalytic Hydrogenation ◽  
Hydrogenation Reaction ◽  
Highly Efficient

Ultra-small Mo2N (2–3 nm) was uniformly anchored onto mesoporous SBA-15, which can be used as a highly efficient promoter of low-loading Pd for the hydrogenation reaction.

A new Ce-doped MgAl-LDH@Au nanocatalyst for highly efficient reductive degradation of organic contaminants

2017 ◽  
Vol 5 (14) ◽  
pp. 6716-6724 ◽  
Author(s):  
Kanwal Iqbal ◽  
Anam Iqbal ◽  
Alexander M. Kirillov ◽  
Bingkai Wang ◽  
Weisheng Liu ◽  
...  
Keyword(s):  
Organic Contaminants ◽  
Au Nanoparticles ◽  
Environmentally Friendly ◽  
Average Diameter ◽  
Au Nps ◽  
Highly Efficient ◽  
Reductive Degradation ◽  
New Type

A new type of convenient, environmentally friendly, and recyclable nanocatalyst (abbreviated as MgAlCe-LDH@Au) was designed and successfully assembled by loading Au nanoparticles (Au NPs; ∼3 nm average diameter) on a MgAlCe-LDH support through an in situ reduction of HAuCl4 by NaBH4.

Development of homogeneous and heterogeneous asymmetric catalysts for practical enantioselective reactions

2006 ◽  
Vol 78 (2) ◽  
pp. 293-301 ◽  
Author(s):  
Kuiling Ding
Keyword(s):  
Metal Ions ◽  
Asymmetric Catalysis ◽  
Asymmetric Hydrogenation ◽  
Combinatorial Approach ◽  
Chiral Catalysts ◽  
Asymmetric Catalysts ◽  
Highly Efficient ◽  
Enantioselective Reactions ◽  
New Strategy ◽  
Hydrogenation Reactions

Two strategies for the development of practical asymmetric catalysis have been discussed in this article. The first part of this article focuses on the design and screening of highly efficient and enantioselective chiral catalysts for asymmetric hydrogenation reactions employing combinatorial approach. The second part presents a conceptually new strategy (i.e., "self-supporting" approach) for the immobilization of homogeneous catalysts through assembly of chiral multitopic ligands and metal ions without using any support. The success of this strategy will be exemplified in heterogeneous asymmetric carbonyl-ene, sulfoxidation, and epoxidation, as well as in asymmetric hydrogenation reactions.

Sign in / Sign up

Export Citation Format

Share Document