Visible light-driven photocatalytic Heck reaction over carbon nanocoil supported Pd nanoparticles

2016 ◽  
Vol 6 (21) ◽  
pp. 7738-7743 ◽  
Author(s):  
Xiao-Wei Guo ◽  
Cai-Hong Hao ◽  
Cheng-Yu Wang ◽  
Sarina Sarina ◽  
Xiao-Ning Guo ◽  
...  
Keyword(s):  
Visible Light ◽  
Heck Reaction ◽  
Coupling Reaction ◽  
Pd Nanoparticles ◽  
Aryl Halides ◽  
Pd Nanoparticle ◽  
Visible Light Driven ◽  
Nanoparticle System ◽  
Supported Pd

This paper presents a carbon nanocoil supported Pd nanoparticle system (Pd/CNCs) as a photocatalyst for coupling reaction of aryl halides and alkenes (Heck reaction) at 40 °C.

Meso–macroporous organic polymer-supported homogeneously dispersed small Pd nanoparticles obtained by a simple ion-exchange approach for the Heck reaction

2019 ◽  
Vol 43 (37) ◽  
pp. 14674-14677 ◽  
Author(s):  
Shunmin Ding ◽  
Baihong Qu ◽  
Yuan Li ◽  
Ling Sun ◽  
Shaohua Wu ◽  
...  
Keyword(s):  
Ion Exchange ◽  
Heck Reaction ◽  
Pd Nanoparticles ◽  
Organic Polymer ◽  
Pd Nanoparticle ◽  
Polymer Supported ◽  
Supported Pd ◽  
Nanoparticle Catalyst

Herein, a meso–macroporous organic polymer-supported Pd nanoparticle catalyst (Pd/MOP-I) with homogeneously dispersed small Pd NPs (ca. 2.4 nm) was synthesized by a simple ion-exchange approach.

scholarly journals Pd Nanoparticles Stabilized by Hypercrosslinked Polystyrene Catalyze Selective Triple C-C Bond Hydrogenation and Suzuki Cross-Coupling

2019 ◽  
Vol 2019 ◽  
pp. 1-7 ◽  
Author(s):  
Linda Zh. Nikoshvili ◽  
Nadezhda A. Nemygina ◽  
Tatiana E. Khudyakova ◽  
Irina Yu. Tiamina ◽  
Alexey V. Bykov ◽  
...  
Keyword(s):  
Phase Transfer ◽  
Aryl Halide ◽  
Coupling Reaction ◽  
Cross Coupling ◽  
Pd Nanoparticles ◽  
Hypercrosslinked Polystyrene ◽  
Reductive Activation ◽  
Pd Nanoparticle ◽  
Cross Coupling Reaction ◽  
Precursor Decomposition

This paper describes the synthesis of Pd-containing catalysts based on nonfunctionalized hypercrosslinked polystyrene via impregnation with Pd acetate. Developed Pd nanoparticulate catalyst allowed achieving conversion of aryl halide up to 90% in Suzuki cross-coupling reaction under mild conditions and at the absence of phase-transfer agents. During the selective hydrogenation of triple C-C bond of 2-methyl-3-butyn-2-ol, up to 96% selectivity with respect to corresponding olefinic alcohol was found at 95% conversion. The influences of the procedure of catalyst synthesis like precursor decomposition and reductive activation method on Pd nanoparticle formation are discussed.

Solvent-free coupling of aryl halides with pyrroles applying visible-light photocatalysis

2017 ◽  
Vol 2 (4) ◽  
pp. 472-478 ◽  
Author(s):  
M. Obst ◽  
R. S. Shaikh ◽  
B. König
Keyword(s):  
Visible Light ◽  
Solvent Free ◽  
Aryl Halides ◽  
Visible Light Photocatalysis ◽  
Visible Light Driven

A novel reactor for solvent-free, visible-light-driven photocatalytic transformations was developed.

Palladium chloride catalyzed photochemical Heck reaction

2013 ◽  
Vol 91 (5) ◽  
pp. 348-351 ◽  
Author(s):  
Suresh B. Waghmode ◽  
Sudhir S. Arbuj ◽  
Bina N. Wani ◽  
C.S. Gopinath
Keyword(s):  
Visible Light ◽  
Heck Reaction ◽  
Palladium Nanoparticles ◽  
Bond Formation ◽  
Aryl Halides ◽  
Palladium Chloride ◽  
Carbon Bond ◽  
Excellent Yield ◽  
Carbon Carbon Bond ◽  
Uv Visible

PdCl2 catalyzed carbon–carbon bond formation (Heck reaction) between substituted aryl halides and olefins was carried out without a ligand, under irradiation with UV–visible light. The results demonstrated that UV–visible light accelerated the rate of the reaction, leading to an excellent yield of corresponding products. The recovered palladium nanoparticles could be thermally recycled several times. PdCl2 gave excellent conversion up to the fifth addition of substrate.

High Catalytic Activity of Pd Nanoparticles Synthesized from Green Alga Chlorella vulgaris in Buchwald-hartwig Synthesis of N-Aryl Piperazines

2019 ◽  
Vol 7 (1) ◽  
pp. 23-33
Author(s):  
Vaibhav Mishra ◽  
Anju Arya ◽  
Tejpal Singh Chundawat
Keyword(s):  
Catalytic Activity ◽  
Green Alga ◽  
Chlorella Vulgaris ◽  
Direct Synthesis ◽  
Coupling Reaction ◽  
Pd Nanoparticles ◽  
High Catalytic Activity ◽  
Pd Nanoparticle ◽  
Green Algal ◽  
Green Alga Chlorella

Background: The N-aryl piperazines are an important component of many drug products used for the treatment of malaria, depression, anxiety and Parkinson diseases. Buchwald-Hartwig amination is the latest and well-known reaction for Pd catalyzed direct synthesis of N-aryl piperazine from aryl halides. Although several Pd-ligand systems have already been discovered for this conversion, Pd nanoparticles are recently being used for this useful coupling reaction due to their recyclability and durability. Metal nanoparticles show enhanced catalytic activity compared to their bulk counterparts due to increased surface area at the edges and corners. The use of green algal extract in place of chemical ligands makes this process more environment-friendly and cost-effective. In this research, Pd nanoparticles synthesized using green alga C. Vulgaris were utilized as an alternative approach for the coupling reaction during the preparation of N-aryl piperazines. Methods: Synthesized Pd nanoparticles from C. Vulgaris were characterized by FTIR, SEM and XRD techniques. The catalytic activity of the synthesized nanoparticles was monitored for the synthesis of N-aryl piperazines by Buchwald-Hartwig reaction. The synthesized N-aryl piperazines were characterized by NMR, FTIR and mass analysis. Results: A very good catalytic activity of the synthesized Pd nanoparticles from green alga Chlorella vulgaris extract was observed. The green alga not only reduces the size of the Pd metal to nanoparticles but also acts as a green ligand for reduction of Pd(II) to Pd(0) during nanoparticle synthesis. Using this Pd nanoparticles-green ligand system, several N-aryl piperazines were synthesized in good to excellent yields. Reaction conditions for better conversion were optimized. The comparative advantage of the catalytic system with recently published works on Buchwald-Hartwig C-N coupling reaction is given. Recyclability and durability of the catalyst were explored and the results were found to be promising. A plausible mechanism of Pd nanoparticle catalyzed reaction is also proposed. Conclusion: Catalytic activity of the Pd nanoparticle synthesized from Chlorella vulagris in the synthesis of N-aryl piperazines by Buchwald-Hartwig reaction is reported first time to the best of our knowledge and understanding. The green approach of Pd catalyst to facilitate the reaction and its environmental impact is the main characteristic of the process.

scholarly journals Photocatalytic C–X borylation of aryl halides by hierarchical SiC nanowire-supported Pd nanoparticles

2020 ◽  
Vol 41 (2) ◽  
pp. 357-363 ◽  
Author(s):  
Zhi-Feng Jiao ◽  
Ji-Xiao Zhao ◽  
Xiao-Ning Guo ◽  
Xiang-Yun Guo
Keyword(s):  
Pd Nanoparticles ◽  
Aryl Halides ◽  
Supported Pd

ChemInform Abstract: ZnO-Supported Pd Nanoparticle-Catalyzed Ligand- and Additive-Free Cyanation of Unactivated Aryl Halides Using K4[Fe(CN)6].

ChemInform ◽  
2014 ◽  
Vol 45 (51) ◽  
pp. no-no
Author(s):  
Tanmay Chatterjee ◽  
Raju Dey ◽  
Brindaban C. Ranu
Keyword(s):  
Aryl Halides ◽  
Pd Nanoparticle ◽  
Supported Pd

Phosphine-stabilized Pd nanoparticles supported on silica as a highly active catalyst for the Suzuki–Miyaura cross-coupling reaction

RSC Advances ◽  
2015 ◽  
Vol 5 (5) ◽  
pp. 3512-3520 ◽  
Author(s):  
Debojeet Sahu ◽  
Pankaj Das
Keyword(s):  
Active Catalyst ◽  
Coupling Reaction ◽  
Cross Coupling ◽  
Pd Nanoparticles ◽  
Highly Dispersed Silica ◽  
Simple Strategy ◽  
Highly Active ◽  
Cross Coupling Reaction ◽  
Highly Dispersed ◽  
Supported Pd

Highly dispersed silica-supported Pd nanoparticles were synthesizedviaa simple strategy. The material showed excellent catalytic activity for Suzuki–Miyaura reactions and could be reused several times.

Sign in / Sign up

Export Citation Format

Share Document