scholarly journals AN EFFICIENT SYNTHESIS OF GEM-DIHYDROPEROXIDES AND 1,2,4,5-TETRAOXANES CATALYZED BYCHLOROSULFONIC ACIDAS A NEW CATALYST

2015 ◽  
Vol 11 (3) ◽  
pp. 3381-3390 ◽  
Author(s):  
Kaveh Khosravi ◽  
Atefeh Asgari
Keyword(s):  
Hydrogen Peroxide ◽  
Room Temperature ◽  
Low Cost ◽  
Chlorosulfonic Acid ◽  
Solid Catalyst ◽  
Efficient Synthesis ◽  
Aqueous Hydrogen Peroxide

Chlorosulfonic acid was used as an active, low-cost and reusable solid catalyst for conversion of ketones and aldehydes to corresponding gem-dihydroperoxides using 30% aqueous hydrogen peroxide at room temperature. The reactions proceed with high rates and excellent yields.

Heteropoly acid/NaY zeolite as a reusable solid catalyst for highly efficient synthesis of gem-dihydroperoxides and 1,2,4,5-tetraoxanes

2016 ◽  
Vol 40 (12) ◽  
pp. 744-749 ◽  
Author(s):  
Kaveh Khosravi ◽  
Mojgan Zendehdel ◽  
Shirin Naserifar ◽  
Fatemeh Tavakoli ◽  
Kobra Khalaji ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Room Temperature ◽  
Heteropoly Acid ◽  
Solid Catalyst ◽  
Efficient Synthesis ◽  
Nay Zeolite ◽  
Aqueous Hydrogen Peroxide ◽  
Highly Efficient ◽  
Aldehydes And Ketones

gem-Dihydroperoxides and 1,2,4,5-tetraoxanes were synthesised from aldehydes and ketones catalysed by heteropoly acid/NaY zeolite (HPA/NaY) as a new, effective and reusable solid catalyst using 30% aqueous hydrogen peroxide at room temperature. The reactions proceeded with high rates and excellent yields.

scholarly journals Regioselective Thiocyanation of Aromatic and Heteroaromatic Compounds Using [2-(Sulfooxy)ethyl]sulfamic Acid as an Efficient, Recyclable Organocatalyst and Novel Difunctional Brønsted Acid

2013 ◽  
Vol 2013 ◽  
pp. 1-7
Author(s):  
Sami Sajjadifar ◽  
Saaid Karimian ◽  
Hadi Noorizadeh ◽  
Hojat Veisi
Keyword(s):  
Hydrogen Peroxide ◽  
Aromatic Amines ◽  
Room Temperature ◽  
Simple Procedure ◽  
Sulfamic Acid ◽  
Chlorosulfonic Acid ◽  
Substituted Anilines ◽  
Heteroaromatic Compounds ◽  
Reaction Cycles ◽  
Considerable Loss

A green and simple procedure for the thiocyanation of aromatic and heteroaromatic compounds is described. [2-(Sulfooxy)ethyl]sulfamic acid (SESA) (supported on silica) is easily produced by addition of chlorosulfonic acid to 2-aminoethanol and this catalyst is applied as an efficient, reusable, and heterogeneous catalyst for the thiocyanation of heterocycles, substituted anilines (electron-rich and electron-deficient), and N,N-disubstituted aromatic amines using hydrogen peroxide in the water : ethanol as a solvent at room temperature. The catalyst can be easily recovered and reused for five reaction cycles without considerable loss of activity.

A General Method for the Synthesis of 3,3-bis(indol-3-yl)indolin-2-ones, bis(indol-3-yl)(aryl)methanes and tris(indol-3-yl)methanes Using Naturally Occurring Mandelic Acid as an Efficient Organo-catalyst in Aqueous Ethanol at Room Temperature

2020 ◽  
Vol 7 (1) ◽  
pp. 128-140 ◽  
Author(s):  
Arvind Singh ◽  
Gurpreet Kaur ◽  
Amninder Kaur ◽  
Vivek K. Gupta ◽  
Bubun Banerjee
Keyword(s):  
Mandelic Acid ◽  
Room Temperature ◽  
Aqueous Ethanol ◽  
Low Cost ◽  
Catalytic Amount ◽  
Environmentally Benign ◽  
Efficient Synthesis ◽  
Naturally Occurring ◽  
General Method

A simple, facile, straightforward and environmentally benign protocol has been developed for the efficient synthesis of pharmaceutically interesting 3,3-bis(indol-3-yl)indolin-2-ones, bis(indol- 3-yl)(aryl)methanes and tris(indol-3-yl)methanes using a catalytic amount of mandelic acid as an efficient, naturally occurring, low-cost, commercially available organo-catalyst in aqueous ethanol at room temperature.

scholarly journals The Selective Oxidation of Sulfides to Sulfoxides or Sulfones with Hydrogen Peroxide Catalyzed by a Dendritic Phosphomolybdate Hybrid

Catalysts ◽  
2019 ◽  
Vol 9 (10) ◽  
pp. 791 ◽  
Author(s):  
Qiao-Lin Tong ◽  
Zhan-Fang Fan ◽  
Jian-Wen Yang ◽  
Qi Li ◽  
Yi-Xuan Chen ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Selective Oxidation ◽  
First Generation ◽  
Low Cost ◽  
Aqueous Hydrogen Peroxide ◽  
Oxidation Of Sulfides ◽  
Smart Drug

The oxidation of sulfides to their corresponding sulfoxides or sulfones has been achieved using a low-cost poly(amidoamine) with a first-generation coupled phosphomolybdate hybrid as the catalyst and aqueous hydrogen peroxide as the oxidant. The reusability of the catalyst was revealed in extensive experiments. The practice of this method in the preparation of a smart drug Modafinil has proved its good applicability.

scholarly journals Molybdatophosphoric acid as an efficient catalyst for the catalytic and chemoselective oxidation of sulfides to sulfoxides using urea hydrogen peroxide as a commercially available oxidant

2010 ◽  
Vol 75 (3) ◽  
pp. 307-316 ◽  
Author(s):  
Alireza Hasaninejad ◽  
Mohammad Zolfigol ◽  
Gholamabbas Chehardoli ◽  
Mohammad Mokhlesi
Keyword(s):  
Hydrogen Peroxide ◽  
Room Temperature ◽  
Low Cost ◽  
Catalytic Amount ◽  
High Yield ◽  
Alkyl Aryl ◽  
Efficient Catalyst ◽  
Efficient Procedure ◽  
Urea Hydrogen Peroxide ◽  
Aryl Sulfides

An efficient procedure for the chemoselective oxidation of alkyl (aryl) sulfides to the corresponding sulfoxides using urea hydrogen peroxide (UHP) in the presence of a catalytic amount of molybdatophosphoric acid at room temperature is described. The advantages of described method are: generality, high yield and chemoselectivity, short reaction time, low cost and compliment with green chemistry protocols.

The Efficient Synthesis of 1,3-Diallyloxy-2-Propanol without Solvent

2011 ◽  
Vol 311-313 ◽  
pp. 2106-2109
Author(s):  
Xi Mei Liu ◽  
Yu Hu ◽  
Li Hua Feng
Keyword(s):  
Allyl Alcohol ◽  
Large Scale ◽  
Room Temperature ◽  
Low Cost ◽  
High Yield ◽  
Scale Production ◽  
Efficient Synthesis ◽  
Reaction Conditions ◽  
One Pot ◽  
Large Scale Production

An efficient and practical protocol for the preparation of 1,3-diallyloxy-2-propanol has been developed by one-pot reaction between epichlorohydrin and allyl alcohol in the presence of KOH without solvent at room temperature. This preliminary approach provides an environmentally-friendly synthetic route to 1,3-diallyloxy-2-propanol with many advantages, i. e., low cost, high yield, easy purification, mild reaction conditions, and large scale production.

Graphene Modified Molecular Imprinting Electrochemical Sensor for Determining the Content of Dopamine

2019 ◽  
Vol 15 (6) ◽  
pp. 628-634
Author(s):  
Rong Liu ◽  
Jie Li ◽  
Tongsheng Zhong ◽  
Liping Long
Keyword(s):  
Electrochemical Sensor ◽  
Molecular Imprinting ◽  
Neurological Disorders ◽  
Room Temperature ◽  
Low Cost ◽  
Differential Pulse ◽  
Current Response ◽  
Specific Selectivity ◽  
Pulse Voltammetry

Background: The unnatural levels of dopamine (DA) result in serious neurological disorders such as Parkinson’s disease. Electrochemical methods which have the obvious advantages of simple operation and low-cost instrumentation were widely used for determination of DA. In order to improve the measurement performance of the electrochemical sensor, molecular imprinting technique and graphene have always been employed to increase the selectivity and sensitivity. Methods: An electrochemical sensor which has specific selectivity to (DA) was proposed based on the combination of a molecular imprinting polymer (MIP) with a graphene (GR) modified gold electrode. The performance and effect of MIP film were investigated by differential pulse voltammetry (DPV) and cyclic voltammetry (CV) in the solution of 5.0 ×10-3 mol/L K3[Fe(CN)6] and K4[Fe(CN)6] with 0.2 mol/L KCl at room temperature. Results: This fabricated sensor has well repeatability and stability, and was used to determine the dopamine of urine. Under the optimized experiment conditions, the current response of the imprinted sensor was linear to the concentration of dopamine in the range of 1.0×10-7 ~ 1.0×10-5 mol/L, the linear equation was I (µA) = 7.9824+2.7210lgc (mol/L) with the detection limit of 3.3×10-8 mol/L. Conclusion: In this work, a highly efficient sensor for determination of DA was prepared with good sensitivity by GR and great selectivity of high special recognization ability by molecular imprinting membrane. This proposed sensor was used to determine the dopamine in human urine successfully.

Sign in / Sign up

Export Citation Format

Share Document