Lactic Acid: An Efficient and Green Catalyst for the One-Pot Five-Components Synthesis of Highly Substituted Piperidines

2016 ◽  
Vol 38 (4) ◽  
pp. 322-328 ◽  
Author(s):  
Mehrnoush Kangani ◽  
Nourallah Hazeri ◽  
Afshin Yazdani-Elah-Abadi ◽  
Malek-Taher Maghsoodlou
Keyword(s):  
Lactic Acid ◽  
One Pot ◽  
Green Catalyst ◽  
The One

scholarly journals Gum arabic-OPO3H2 as a new natural-based green catalyst for the one-pot pseudo-four-component synthesis of naphtho[1,2-e][1,3]oxazines

RSC Advances ◽  
2020 ◽  
Vol 10 (66) ◽  
pp. 40508-40513
Author(s):  
Sahar Saadat Hosseinikhah ◽  
Bi Bi Fatemeh Mirjalili ◽  
Naeimeh Salehi ◽  
Abdolahamid Bamoniri
Keyword(s):  
Gum Arabic ◽  
Phosphorus Pentoxide ◽  
One Pot ◽  
Green Catalyst ◽  
The One

Gum arabic-OPO3H2 (GA-OPO3H2) as a unique natural-based green catalyst was synthesized by the reaction of phosphorus pentoxide with gum arabic.

scholarly journals Production of lactic acid from cellulose using solid catalyst

2019 ◽  
Vol 268 ◽  
pp. 07006 ◽  
Author(s):  
Sujitra Doungsri ◽  
P. Rattanaphanee ◽  
Aatichat Wongkoblap
Keyword(s):  
Lactic Acid ◽  
Batch Reactor ◽  
Nitrogen Pressure ◽  
Reaction Pathways ◽  
Solid Catalyst ◽  
One Pot ◽  
Solid Catalysts ◽  
Platform Chemicals ◽  
Acid And Base ◽  
The One

Lactic acid (LA), one of the important biomass derived platform chemicals, has been used in food and chemical industries, especially in biodegradable polymer as polylactic acid (PLA). The aim of this work is to study the one-pot production of LA from cellulose by using different solid catalysts. The reaction was conducted in a high pressure batch reactor and the catalyst used in this study were ZrO2 and Al2O3. The reaction was carried out at temperature of 200oC for 6 hr. and under nitrogen pressure of 1 MP. It was found that the production yield of LA were 8.02% and 6.63%, when the ZrO2 and Al2O3 catalysts were used respectively. The result indicated that the ZrO2 may effect on the LA production because of the acid and base sites of the ZrO2. Therefore, the reaction pathways for conversion of cellulose into lactic acid have been investigated, and developed the new conditions to achieve the higher yield.

scholarly journals A Study on the Kinetics and Mechanism of the One-Pot Formation of 3,4,5-Substituted Furan-2(5H)-Ones in the Presence of Lactic Acid: Effect of Different Substituents

2018 ◽  
Vol 43 (3-4) ◽  
pp. 286-299 ◽  
Author(s):  
Osman Asheri ◽  
Sayyed Mostafa Habibi-Khorassani ◽  
Mehdi Shahraki
Keyword(s):  
Lactic Acid ◽  
Activation Parameters ◽  
General Mechanism ◽  
Common Mechanism ◽  
Substituted Anilines ◽  
One Pot ◽  
Isokinetic Relationship ◽  
Zero Order Kinetics ◽  
Different Temperatures ◽  
The One

The kinetics of the reaction between para-substituted anilines and dimethyl acetylenedicarboxylate (DMAD) with derivatives of benzaldehyde for the one-pot formation of 3,4,5-substituted furan-2(5 H)-ones in the presence of lactic acid as a catalyst have been studied spectrophotometrically at different temperatures. A mechanism involving four steps was proposed for the reactions, all of which followed second-order kinetics. The partial orders with respect to substituted aniline and DMAD were one and one and the reactions revealed zero-order kinetics for benzaldehyde and its derivatives. Changing of substituents on benzaldehyde left rates of reaction unaffected. However, various substituents on aniline showed that para electron-withdrawing groups decreased the rate of reaction. According to investigation of an isokinetic relationship, a common mechanism exists for all studied substituents and a general mechanism can be formulated. Kinetic values ( k and Ea) and associated activation parameters (Δ G‡, Δ S‡ and Δ H‡) of the reactions were determined.

Fulvic Acid: An Efficient and Green Catalyst for the One-pot Four-component Domino Synthesis of Benzo[a]phenazine Annulated Heterocycles in Aqueous Medium

2020 ◽  
Vol 52 (1) ◽  
pp. 48-55 ◽  
Author(s):  
Afshin Yazdani-Elah-Abadi ◽  
Maliheh Razeghi ◽  
Nasim Shams ◽  
Mehrnoush Kangani ◽  
Razieh Mohebat
Keyword(s):  
Fulvic Acid ◽  
Aqueous Medium ◽  
One Pot ◽  
Green Catalyst ◽  
The One

scholarly journals Convenient Approach for the One-Pot, Three-Component Synthesis of 1-(Benzothiazolylamino)Methyl-2- Naphthol Using Citric Acid as a Green Catalyst

2016 ◽  
Vol 24 (2) ◽  
pp. 112-121 ◽  
Author(s):  
Mojtaba Lashkari ◽  
Malek Taher Maghsoodlou ◽  
Mahsa Karima ◽  
Belgais Adrom ◽  
Maryam Fatahpour
Keyword(s):  
Citric Acid ◽  
Isolation Procedure ◽  
Multicomponent Synthesis ◽  
One Pot ◽  
Green Catalyst ◽  
Mild Conditions ◽  
Convenient Approach ◽  
The One ◽  
Naphthol Derivatives

Abstract A straightforward, one-pot multicomponent synthesis of 1-(benzothiazolylamino)methyl-2-naphthol derivatives was achieved by condensation of 2-naphthol, aldehydes, and 2- aminobenzothiazole catalyzed by a small amount of citric acid, which acts as a benign enviermentally catalyst. Mild conditions with excellent yields and a simple isolation procedure are noteworthy advantages of this method.

Glutamic Acid as an Efficient and Green Catalyst for the One-Pot Synthesis of 1,2,4,5-Tetrasubstituted Imidazoles under Thermal, Solvent-Free Conditions

2017 ◽  
Vol 41 (11) ◽  
pp. 673-675 ◽  
Author(s):  
Fahimeh Khazaee Feizabad ◽  
Khatereh Khandan-Barani ◽  
Alireza Hassanabadi
Keyword(s):  
Glutamic Acid ◽  
Reaction Times ◽  
Catalytic Amount ◽  
Solvent Free ◽  
One Pot ◽  
Green Catalyst ◽  
Aryl Aldehydes ◽  
Solvent Free Conditions ◽  
The One ◽  
Tetrasubstituted Imidazoles

A high-yielding synthesis of 1,2,4,5-tetrasubstituted imidazoles is described, involving the reaction of 1,2-dicarbonyl compounds, aryl aldehydes, amines and ammonium acetate in the presence of a catalytic amount of glutamic acid under thermal, solvent-free conditions. The salient features of this protocol are aerobic conditions, a non-hazardous green catalyst, short reaction times and mild reaction conditions.

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