BF3/nano-sawdust as a green, biodegradable and inexpensive catalyst for the synthesis of highly substituted dihydro-2-oxopyrroles

RSC Advances ◽  
2015 ◽  
Vol 5 (20) ◽  
pp. 15566-15571 ◽  
Author(s):  
Bi Bi Fatemeh Mirjalili ◽  
Reza Zare Reshquiyea
Keyword(s):  
Solid Acid ◽  
Solid Acid Catalyst ◽  
Acid Catalyst ◽  
Environmentally Benign ◽  
One Pot ◽  
The One ◽  
Heterogeneous Solid

BF3/nano-sawdust was used as a readily available, inexpensive, biodegradable and environmentally benign heterogeneous solid acid catalyst for the one-pot cascade synthesis of highly functionalized dihydro-2-oxypyrroles.

scholarly journals Phosphosulfonic acid, an efficient solid acid catalyst for the one-pot preparation of 14-aryl-14H-dibenzo[a,j]xanthenes and 1,8-dioxo-octahydro-xanthenes under solvent-free conditions

2013 ◽  
Vol 78 (9) ◽  
pp. 1291-1299 ◽  
Author(s):  
Reza Kiasat ◽  
Arash Mouradzadegun ◽  
Jafar Saghanezhad
Keyword(s):  
Solid Acid ◽  
Solid Acid Catalyst ◽  
Acid Catalyst ◽  
Environmentally Benign ◽  
Reaction Conditions ◽  
One Pot ◽  
Aryl Aldehydes ◽  
Solvent Free Conditions ◽  
The One ◽  
High Yields

An expeditious procedure for the synthesis of 14- aryl-14H-dibenzo[a,j]xanthenes and 1,8-dioxo-octahydro-xanthenes through one-pot pseudo three component condensation of ?-naphthol or dimedone with various aryl aldehydes is described. This greener protocol is catalyzed by phosphosulfonic acid, and proceeds efficiently in the absence of any organic solvent under optimized, mild, green and environmentally benign reaction conditions in high yields within 20-55 minutes.

scholarly journals Phospho sulfonic acid: A novel and efficient solid acid catalyst for the one-pot preparation of 2H-indazolo[2,1-b]-phthalazine-triones

2013 ◽  
Vol 78 (4) ◽  
pp. 469-476 ◽  
Author(s):  
Reza Kiasat ◽  
Arash Mouradezadegun ◽  
Jafar Saghanezhad
Keyword(s):  
Sulfonic Acid ◽  
Solid Acid ◽  
Solid Acid Catalyst ◽  
Acid Catalyst ◽  
Catalytic Amount ◽  
One Pot ◽  
Solvent Free Conditions ◽  
Three Component Reaction ◽  
The One ◽  
Short Time

The efficient one-pot condensation of aldehyde, dimedone, and phthalhydrazide has been achieved in the presence of a catalytic amount of phospho sulfonic acid as a novel environmentally benign heterogeneous solid acid under solvent-free conditions. A diversified 2H-indazolo[1,2-b]phthalazinetrione derivatives were prepared in good to excellent yields in short time. The economical factors (time, cost, waste etc.) for this three-component reaction hold promise for the future of organic synthesis.

A new procedure for the preparation of 3,4-dihydropyrimidin-2(1H)-one and octahydroquinazolinone derivatives catalyzed by SCMNPs@CA-EA-SO3H under solvent-free conditions

2021 ◽  
Vol 19 ◽  
Author(s):  
Asieh Yahyazadeh ◽  
Motahare Nafei-Kohi ◽  
Esmayeel Abbaspour-Gilandeh ◽  
Mehraneh Aghaei-Hashjin
Keyword(s):  
Solid Acid Catalyst ◽  
Reaction Times ◽  
Acid Catalyst ◽  
Solvent Free ◽  
One Pot ◽  
Reaction Solution ◽  
Solvent Free Conditions ◽  
The One ◽  
Heterogeneous Solid ◽  
Octahydroquinazolinone Derivatives

Abstract: Catalyzed with SCMNPs@CA-EA-SO3H, as a green and heterogeneous solid acid catalyst, 3,4-dihydropyrimidin-2(1H)-one and octahydroquinazolinone derivatives were obtained in high-to-excellent yields and in short reaction times via the one-pot multi-component condensation of ethyl acetoacetate or dimedone, urea, and aldehyde compounds under solvent-free conditions. More importantly, the green catalytic system could be easily collected from the reaction solution utilizing an external magnet and reused for five runs with a negligible decrease in yields and reaction rate.

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