Copper on boehmite: A simple, selective, efficient and reusable heterogeneous catalyst for oxidation of alcohols with periodic acid in water at room temperature

2011 ◽  
Vol 392 (1-2) ◽  
pp. 218-224 ◽  
Author(s):  
S. Ganesh Babu ◽  
P. Aruna Priyadarsini ◽  
R. Karvembu
Keyword(s):  
Heterogeneous Catalyst ◽  
Room Temperature ◽  
Periodic Acid ◽  
Oxidation Of Alcohols

scholarly journals Fe(II)-phthalocyanine supported on chitosan aerogel as a catalyst for oxidation of alcohols and alkyl arenes

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Fatemeh Azimi ◽  
Ahmad Poursattar Marjani ◽  
Sajjad Keshipour
Keyword(s):  
Aspect Ratio ◽  
Heterogeneous Catalyst ◽  
High Aspect Ratio ◽  
Room Temperature ◽  
Oxidation Reactions ◽  
Mild Conditions ◽  
Oxidation Of Alcohols ◽  
Aromatic Alcohols ◽  
Aldehydes And Ketones ◽  
Low Toxicity

AbstractManipulation of materials is considered as one of the eminent strategies to create desirable catalysts. In this regard, increasing surface area and decreasing dimensions of catalysts have been widely employed on account of effectiveness of these methods. Herein, aerogel form of chitosan as a sustainable, and high aspect ratio compound is employed as a green support for the catalytic purposes. Chitosan aerogel was modified with Fe(II)-phthalocyanine to produce a heterogeneous catalyst for oxidation reactions. The synthesized catalyst promoted the oxidation reactions of alcohols and alkyl arenes to the corresponding aldehydes and ketones using H2O2 as an oxidant in 24 h. The reactions for aliphatic and aromatic alcohols gave turnover numbers of 106–109 at 80 °C and 106–117 at room temperature, respectively. The oxidations of alkyl arenes were carried out with turnover numbers laying in the range of 106–117 at 100 °C. The low toxicity, inexpensive nature, and recycling possibility of the catalyst accompanied by the reaction mild conditions, clean oxidant, and excellent yields offer chitosan aerogel modified with Fe(II)-phthalocyanine as a promising catalyst for oxidation reactions.

Nanocrystalline cellulose grafted phthalocyanine: a heterogeneous catalyst for selective aerobic oxidation of alcohols and alkyl arenes at room temperature in a green solvent

RSC Advances ◽  
2015 ◽  
Vol 5 (47) ◽  
pp. 37517-37520 ◽  
Author(s):  
Prashant Chauhan ◽  
Ning Yan
Keyword(s):  
Aqueous Medium ◽  
Heterogeneous Catalyst ◽  
Cellulose Nanocrystals ◽  
Room Temperature ◽  
Aerobic Oxidation ◽  
Nanocrystalline Cellulose ◽  
Green Solvent ◽  
Oxidation Of Alcohols ◽  
Selective Aerobic Oxidation

A Cu-tetrasulfonate-phthalocyanine was conjugated to cationic cellulose nanocrystals which serve as a heterogeneous based catalyst for aerobic oxidation of alcohols and alkyl arenes at room temperature in aqueous medium.

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.

scholarly journals Room temperature silylation of alcohols catalyzed by metal organic frameworks

2017 ◽  
Vol 7 (12) ◽  
pp. 2445-2449 ◽  
Author(s):  
Amarajothi Dhakshinamoorthy ◽  
Andrea Santiago-Portillo ◽  
Patricia Concepción ◽  
José R. Herance ◽  
Sergio Navalón ◽  
...  
Keyword(s):  
Heterogeneous Catalyst ◽  
Room Temperature ◽  
Metal Organic Frameworks ◽  
Aliphatic Alcohols ◽  
Benzenedicarboxylic Acid ◽  
Metal Organic

Commercial Al(OH)(BDC) (BDC: 1,4-benzenedicarboxylic acid) is a suitable heterogeneous catalyst for the silylation of benzylic and aliphatic alcohols by hexamethyldisilazane in toluene at room temperature.

Efficient synthesis of pyrido[2,3-d]pyrimidine-7-carboxylic acids catalyzed by a TiO2/SiO2 nanocomposite in aqueous media at room temperature

2018 ◽  
Vol 73 (9) ◽  
pp. 641-645 ◽  
Author(s):  
Sepehr Sadegh-Samiei ◽  
Shahrzad Abdolmohammadi
Keyword(s):  
Heterogeneous Catalyst ◽  
Carboxylic Acids ◽  
Room Temperature ◽  
Aqueous Media ◽  
Reaction Times ◽  
Molar Ratio ◽  
Efficient Synthesis ◽  
Reaction Conditions ◽  
Moderate Reaction ◽  
Recyclable Heterogeneous Catalyst

AbstractA novel and efficient synthesis of eight 5-aryl-1,3-dimethyl-2,4-dioxo-1,2,3,4,5,8-hexahydropyrido[2,3-d]pyrimidine-7-carboxylic acids using a TiO2/SiO2 nanocomposite with a molar ratio of 1:1 as a recyclable heterogeneous catalyst is described. The desired products, five of which are new, are formed in short reaction times (2–3 h) with high to excellent yields (94%–98%) under very moderate reaction conditions (room temperature, aqueous media).

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