scholarly journals FeCl3/Egg shell: An Effective Catalytic System for the Synthesis of 2,3-Dihydroquinazolin-4(1H)-ones at Room Temperature

2017 ◽  
pp. 775-786
Author(s):  
Said Boukhris
Keyword(s):  
Catalytic System ◽  
Room Temperature ◽  
Egg Shell

Knoevenagel Condensations Catalyzed by New Oil Shale Recyclable Catalyst at Room Temperature and Assisted by Ultrasounds Irradiations

2021 ◽  
Vol 37 (6) ◽  
pp. 1295-1301
Author(s):  
Elmustapha Ennesyry ◽  
Fathallaah Bazi ◽  
Bahija Mounir ◽  
M’hammed Elkouali Elkouali ◽  
Hassan Hannache ◽  
...  
Keyword(s):  
Heterogeneous Catalyst ◽  
Catalytic System ◽  
Oil Shale ◽  
Room Temperature ◽  
Knoevenagel Condensation ◽  
Recyclable Catalyst ◽  
Short Time

Functionalized alkenes were successfully synthesized via a clean procedure in a short time by using a new recycled heterogeneous catalyst prepared from Moroccan oil shale, this catalyst is characterized by different technics such XRD, BET-BJH, MEB-EDS, and TGA, before it’s has been used in the Knoevenagel condensation between different aldehydes and active methylenes. The results showed that coupling the catalyst with ultrasound irradiations could improve the catalytic system in this transformation by achieving the products in a very short time, the results showed clearly that this catalyst could be considered as excellent recyclable support in Knoevenagel condensation.

A highly efficient copper and ligand free protocol for the room temperature Sonogashira reaction

RSC Advances ◽  
2015 ◽  
Vol 5 (1) ◽  
pp. 16-19 ◽  
Author(s):  
Ankur Gogoi ◽  
Anindita Dewan ◽  
Utpal Bora
Keyword(s):  
Catalytic System ◽  
Room Temperature ◽  
Sonogashira Reaction ◽  
Highly Efficient ◽  
Aryl Iodides ◽  
Ligand Free

A mild and efficient catalytic system based on PdCl2 and Na2SO4 has been developed for the Sonogashira reaction of aryl iodides at room temperature.

scholarly journals Noble metal-free upgrading of multi-unsaturated biomass derivatives at room temperature: silyl species enable reactivity

2018 ◽  
Vol 20 (23) ◽  
pp. 5327-5335 ◽  
Author(s):  
Hu Li ◽  
Wenfeng Zhao ◽  
Wenshuai Dai ◽  
Jingxuan Long ◽  
Masaru Watanabe ◽  
...  
Keyword(s):  
Noble Metal ◽  
Catalytic System ◽  
Room Temperature ◽  
Metal Free

A simple and robust catalytic system is described for the controllable conversion of biomass-derived chemicals.

CuI/Et2NH-Catalyzed One-Pot Highly Efficient Synthesis of 1,4-Disubstituted 1,2,3-Triazoles in Green Solvent Glycerol

Synthesis ◽  
2018 ◽  
Vol 50 (11) ◽  
pp. 2191-2199 ◽  
Author(s):  
Yongde Zhao ◽  
Shengqiang Guo ◽  
Yang Zhou ◽  
Bencai Dai ◽  
Cuimeng Huo ◽  
...  
Keyword(s):  
Catalytic System ◽  
Sodium Azide ◽  
Room Temperature ◽  
Green Solvent ◽  
Efficient Synthesis ◽  
One Pot ◽  
Highly Efficient ◽  
Three Component Reaction ◽  
Efficient Route ◽  
Terminal Acetylenes

A concise one-pot three-component reaction of organic halides­, terminal acetylenes, and sodium azide provided an efficient route for the synthesis of 1,2,3-triazoles. A variety of 1,2,3-triazoles were prepared in good to excellent yields with green solvent glycerol. This procedure used CuI and diethylamine, which are two easily available reagents as the new catalytic system at room temperature.

Efficient Copper-Catalyzed Synthesis of Substituted Pyrazoles at Room Temperature

Synlett ◽  
2018 ◽  
Vol 29 (20) ◽  
pp. 2689-2692 ◽  
Author(s):  
Haifeng Wang ◽  
Xiangli Sun ◽  
Shuangling Zhang ◽  
Guanglu Liu ◽  
Chunjie Wang ◽  
...  
Keyword(s):  
Reaction Time ◽  
Catalytic System ◽  
Efficient Method ◽  
Room Temperature ◽  
Copper Catalyst ◽  
Condensation Reaction ◽  
Reaction Conditions ◽  
Short Reaction Time ◽  
Acid Catalyzed ◽  
Substituted Pyrazoles

An efficient method for the synthesis of pyrazoles through a copper-catalyzed condensation reaction has been developed. The new catalytic system not only maintained a broad substrate scope but was also active under acid-free reaction conditions, overcoming the conventional requirement for an acid-catalyzed system. Furthermore, the copper catalyst enabled this reaction to be performed at room temperature and in a short reaction time.

Intramolecular Hydroalkoxylation/Reduction and Hydroamination/Reduction of Unactivated Alkynes Using a Silane–Iodine Catalytic System

Synthesis ◽  
2017 ◽  
Vol 49 (18) ◽  
pp. 4199-4204 ◽  
Author(s):  
Masatoshi Shibuya ◽  
Shoji Fujita ◽  
Yoshihiko Yamamoto
Keyword(s):  
Transition Metal ◽  
Catalytic System ◽  
Room Temperature ◽  
Metal Free

A transition-metal-free silane–iodine catalytic system comprising I2 and Et3SiH promotes intramolecular hydroalkoxylation/reduction and hydroamination/reduction of unactivated alkynes. This system allows the reaction to proceed at room temperature affording 2,4- and 2,5-disubstituted pyrrolidines as well as a 2,3-disubstituted tetrahydrofuran with high diastereoselectivity.

Facile synthesis of well-controlled poly(glycidyl methacrylate) and its block copolymers via SARA ATRP at room temperature

2015 ◽  
Vol 6 (10) ◽  
pp. 1875-1882 ◽  
Author(s):  
Francisco Catalão ◽  
Joana R. Góis ◽  
A. S. M. Trino ◽  
Arménio C. Serra ◽  
Jorge F. J. Coelho
Keyword(s):  
Block Copolymers ◽  
Atom Transfer Radical Polymerization ◽  
Radical Polymerization ◽  
Catalytic System ◽  
Glycidyl Methacrylate ◽  
Room Temperature ◽  
Atom Transfer ◽  
Facile Synthesis

The detailed synthesis of poly(glycidyl methacrylate) (PGMA) by atom transfer radical polymerization (ATRP) using a catalytic system of Fe(0)/Cu(ii)Br2 at room temperature is reported.

Degradation of the active species in the catalytic system Pd(OAc)2/NEt3

RSC Advances ◽  
2016 ◽  
Vol 6 (105) ◽  
pp. 103088-103094 ◽  
Author(s):  
Jesús Sanmartín-Matalobos ◽  
Concepcion González-Bello ◽  
Lucía Briones-Miguéns ◽  
Matilde Fondo ◽  
Ana M. García-Deibe
Keyword(s):  
Catalytic System ◽  
Room Temperature ◽  
Aerobic Oxidation ◽  
Active Species ◽  
Efficient Catalyst ◽  
Ambient Humidity ◽  
Oxidation Of Alcohols

The degradation under ambient humidity and room temperature of Pd(OAc)2(NEt3), which is an efficient catalyst for the aerobic oxidation of alcohols, to diethylamine and acetaldehyde derivatives is disclosed.

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