Nano-silica supported palladium nanoparticles: A sustainable nanocatalyst for efficient synthesis of 2,3-diarylimidazo[1,2-a]pyridines at low catalyst loading

2018 ◽  
Vol 105 ◽  
pp. 59-64 ◽  
Author(s):  
Mohammad Akrami Abarghooei ◽  
Razieh Mohebat ◽  
Zahed Karimi-Jaberi ◽  
Mohammad Hossein Mosslemin
Keyword(s):  
Palladium Nanoparticles ◽  
Catalyst Loading ◽  
Efficient Synthesis ◽  
Nano Silica ◽  
Supported Palladium ◽  
Low Catalyst Loading

scholarly journals Carbonylative Suzuki–Miyaura Coupling Reactions of Aryl Iodides with Readily Available Polymer-Immobilized Palladium Nanoparticles

Synlett ◽  
2020 ◽  
Author(s):  
Tomohiro Yasukawa ◽  
Shu Kobayashi ◽  
Zhiyuan Zhu ◽  
Yasuhiro Yamashita
Keyword(s):  
Palladium Nanoparticles ◽  
Catalyst Loading ◽  
Coupling Reactions ◽  
Arylboronic Acids ◽  
Aryl Iodides ◽  
Ligand Free ◽  
Simple Filtration ◽  
Supported Palladium ◽  
High Yields ◽  
Low Catalyst Loading

Polysilane/alumina-supported palladium nanoparticle catalyzed carbonylative Suzuki–Miyaura coupling reactions under ligand-free conditions have been developed to synthesize diaryl ketones. High yields and selectivities were achieved even with low catalyst loading under atmospheric pressure of CO gas. A variety of aryl iodides and arylboronic acids could be utilized to afford the diaryl ketones in excellent yields. Moreover, the ligand-free immobilized palladium nanoparticles could be recovered by simple filtration and the catalytic activity could be maintained for several runs.

Three-Component Synthesis of 4-Arylidene-3-alkylisoxazol-5(4H)-ones in the presence of potassium 2,5-dioxoimidazolidin-1-ide

2021 ◽  
Vol 25 ◽  
Author(s):  
Neda Reihani ◽  
Hamzeh Kiyani
Keyword(s):  
Ethylene Glycol ◽  
Ethyl Acetoacetate ◽  
Reaction Medium ◽  
Hydroxylamine Hydrochloride ◽  
Aromatic Aldehydes ◽  
Catalyst Loading ◽  
Efficient Synthesis ◽  
Current Process ◽  
High Yields ◽  
Low Catalyst Loading

: An efficient synthesis of 4-arylidene-3-alkylisoxazole-5(4H)-ones has been implemented via the three-component cyclocondensation of aryl(heteroaryl)aldehydes with hydroxylamine hydrochloride and β-ketoesters. The potassium 2,5-dioxoimidazolidin-1-ide has been introduced as the new organocatalyst to facilitate of this heterocyclization. In the current process, three starting materials, including substituted benzaldehydes/heterocyclic aromatic aldehydes, hydroxylamine hydrochloride, and ethyl acetoacetate/propyl acetoacetate/butyryl acetoacetate have been successfully used for the synthesize of the number of substituted isoxazole-5(4H)-ones in good to high yields in ethylene glycol as a green reaction medium at 80 ºC. The low catalyst loading is also a main advantage over the some reported catalysts.

Bis[N,N′-(2-indanolyl)]-1,5-diazacyclooctane as Unique Metal Ligand: Self-Assembly of Palladium Nanoparticles and Catalytic Reactivity on C–C Bond Formation

Synthesis ◽  
2017 ◽  
Vol 50 (05) ◽  
pp. 1097-1104 ◽  
Author(s):  
Katsunori Tanaka ◽  
Katsumasa Fujiki
Keyword(s):  
Heterogeneous Catalyst ◽  
Self Assembly ◽  
Palladium Nanoparticles ◽  
Bond Formation ◽  
Suzuki Coupling ◽  
Catalyst Loading ◽  
Loading Conditions ◽  
Catalytic Reactivity ◽  
Low Catalyst Loading ◽  
Metal Ligand

A previously unreported 1,5-diazacyclooctane-palladium(II) complex was synthesized using bis[N,N′-(2-indanolyl)]-1,5-diazacyclooctane, which was readily prepared via a novel [4+4] homocyclization of the unsaturated imine intermediate generated from acrolein and 1-amino-2-indanol. Interestingly, the 1,5-diazacyclooctane-palladium(II) complex self-assembled to form palladium nanoparticles. This approach readily provided palladium nanoparticles simply by heating a mixture of palladium(II) acetate and bis[N,N′-(2-indanolyl)]-1,4-diazacyclooctane in dichloroethane at mild temperatures. The 1,5-diazacyclooctane-derivative-palladium nanoparticles were successfully deployed in synthetic applications as a heterogeneous catalyst, facilitating Suzuki coupling and a challenging C–C bond formation via C(sp3)–H activation under low catalyst loading conditions.

scholarly journals Palladium nanoparticles immobilized on a nano-silica triazine dendritic polymer: a recyclable and sustainable nanoreactor for C–S cross-coupling

RSC Advances ◽  
2020 ◽  
Vol 10 (36) ◽  
pp. 21198-21205
Author(s):  
Amir Landarani-Isfahani ◽  
Iraj Mohammadpoor-Baltork ◽  
Valiollah Mirkhani ◽  
Majid Moghadam ◽  
Shahram Tangestaninejad ◽  
...  
Keyword(s):  
Palladium Nanoparticles ◽  
Cross Coupling ◽  
Aryl Halides ◽  
Efficient Synthesis ◽  
Nano Silica ◽  
Dendritic Polymer

Efficient synthesis of diaryl sulfides via C–S cross-coupling of aryl halides with disulfides catalyzed by Pdnp-nSTDP is reported.

Preparation and Application of Carbon Nanofibers-supported Palladium Nanoparticles Catalysts Based on Electrospinning

2014 ◽  
Vol 29 (8) ◽  
pp. 814 ◽  
Author(s):  
GUO Li-Ping ◽  
BAI Jie ◽  
LIANG Hai-Ou ◽  
LI Chun-Ping ◽  
SUN Wei-Yan ◽  
...  
Keyword(s):  
Carbon Nanofibers ◽  
Palladium Nanoparticles ◽  
Supported Palladium

Y(OTf)3-catalyzed Phosphorylation of 2H-Chromene Hemiacetals with P(O)-H compounds to 2-Phosphorylated 2H-Chromenes

2021 ◽  
Author(s):  
Long Chen ◽  
Shi-Lu Zheng ◽  
Yun-Xiang Zou ◽  
Zhong Wen ◽  
Jiafu Lin ◽  
...  
Keyword(s):  
Catalyst Loading ◽  
Facile Synthesis ◽  
Reaction Conditions ◽  
Low Catalyst Loading

Facile synthesis of 2-phosphorylated 2H-chromenes has been accomplished herein via a Y(OTf)3-catalyzed dehydrative coupling of 2H-chromene hemiacetals with P(O)-H compounds. This protocol features low catalyst loading, mild reaction conditions, broad...

Sign in / Sign up

Export Citation Format

Share Document