Lanthanide Triflate Catalyzed One-Pot Synthesis of Dihydropyrimidin-2(1H)-thiones by a Three-Component of 1,3-Dicarbonyl Compounds, Aldehydes, and Thiourea Using a Solvent-Free Biginelli Condensation

2003 ◽  
Vol 33 (9) ◽  
pp. 1459-1468 ◽  
Author(s):  
Limin Wang ◽  
Changtao Qian ◽  
He Tian ◽  
Yun Ma
Keyword(s):  
Solvent Free ◽  
One Pot ◽  
Dicarbonyl Compounds ◽  
One Pot Synthesis ◽  
Biginelli Condensation

scholarly journals One-Pot Synthesis of 1,8-Dioxodecahydroacridines and Polyhydroquinoline using 1,3-Di (bromo or chloro)-5,5-Dimethylhydantoin as a Novel and Green Catalyst under Solvent-Free Conditions

2017 ◽  
Vol 57 (4) ◽  
Author(s):  
Behrooz Maleki ◽  
Reza Tayebee ◽  
Mina Kermanian ◽  
Samaneh Sedigh Ashrafi
Keyword(s):  
Ethyl Acetoacetate ◽  
Ammonium Acetate ◽  
Solvent Free ◽  
Environmentally Benign ◽  
One Pot ◽  
Dicarbonyl Compounds ◽  
Green Catalyst ◽  
One Pot Synthesis ◽  
Solvent Free Conditions ◽  
Hantzsch Condensation

Solvent-free, one-pot synthesis of polyhdroquinoline and 1,8-dioxodecahydroacridine derivatives have been described via Hantzsch condensation of various aldehydes, ammonium acetate with (<em>i</em>) cyclic 1,3-dicarbonyl compounds and ethyl acetoacetate and (<em>ii</em>) cyclic 1,3-dicarbonyl compounds (2 mmoles) in a very simple, efficient, and environmentally benign method using 1,3-(dibromo or dichloro)-5,5-dimethylhydantoin as a cheap, non-toxic and neutral catalyst with up to excellent yields.

scholarly journals An Efficient One-Pot Multi-Component Synthesis of 3,4-Dihydropyrimidin-2-(1H)-Ones/Thiones Catalyzed by Bismuth (III) Sulfate Trihydrate under Solvent-Free Conditions

2014 ◽  
Vol 2014 ◽  
pp. 1-5 ◽  
Author(s):  
Farhad Hatamjafari
Keyword(s):  
Solvent Free ◽  
One Pot ◽  
Dicarbonyl Compounds ◽  
One Pot Synthesis ◽  
Solvent Free Conditions ◽  
The One ◽  
Short Time ◽  
Derivatives Of

A convenient and efficient protocol for the one-pot synthesis of 3,4-dihydropyrimidin-2-(1H)-one/thione derivatives of aldehydes, and 1,3-dicarbonyl compounds with Bismuth (III) sulfate trihydrate as the catalyst was described. We had the advantages of good performance, simplicity, and short time reaction under solvent-free conditions. The catalyst can be repeatedly reused without loss of its activity.

scholarly journals Gypsum-Catalyzed One-Pot Synthesis of 3,4-Dihydropyrimidin-2(1H)Under Solvent-Free Conditions

2011 ◽  
Vol 8 (1) ◽  
pp. 312-318 ◽  
Author(s):  
Taoues Boumoud ◽  
Boudjemaa Boumoud ◽  
Paul Mosset ◽  
Abdelmadjid Debache
Keyword(s):  
Green Chemistry ◽  
Solvent Free ◽  
Biologically Active ◽  
Economic Approach ◽  
One Pot ◽  
One Pot Synthesis ◽  
Environmental Friendly ◽  
Solvent Free Conditions ◽  
Pharmaceutical Industries ◽  
Biginelli Condensation

In view of the emerging importance of the green chemistry principles in chemical and pharmaceutical industries, we disclose, herein, a new economic approach producing the biologically active dihydropyrimidinones in good yields using the solventless one-pot Biginelli condensation in the presence of gypsum as an environmental friendly and recycled catalyst.

scholarly journals Tandem Fries Reaction–Conjugate Addition under Microwave Irradiation in Dry Media; One-pot Synthesis of Flavanones

1999 ◽  
Vol 23 (9) ◽  
pp. 574-575
Author(s):  
Firouz Matloubi Moghaddam ◽  
Mohammad Ghaffarzadeh ◽  
Seyed Hossein Abdi-Oskoui
Keyword(s):  
Microwave Irradiation ◽  
Silica Gel ◽  
Conjugate Addition ◽  
Solvent Free ◽  
Naphthalene Derivatives ◽  
One Pot ◽  
Fries Rearrangement ◽  
One Pot Synthesis ◽  
Solvent Free Conditions ◽  
Fries Reaction

An AICl3–ZnCl2 mixture supported on silica gel is found to be an efficient medium for the Fries rearrangement of acyloxybenzene or naphthalene derivatives in solvent-free conditions under microwave irradiation.

A Facile and Practical Solvent-Free One-Pot Synthesis of (Z)-4-Methylene-3-selenaquinoline Derivatives from o-Ethynylanilines and Isoselenocyanates¹

Synthesis ◽  
2010 ◽  
Vol 2010 (18) ◽  
pp. 3091-3096 ◽  
Author(s):  
Haruki Sashida ◽  
Chao Pan ◽  
Mamoru Kaname ◽  
Mao Minoura
Keyword(s):  
Solvent Free ◽  
One Pot ◽  
One Pot Synthesis

Solvent-free One-pot Synthesis of 2,2′-dithioxo-[5,5′]bithiazolidinylidene-4,4′-diones

2015 ◽  
Vol 53 (3) ◽  
pp. 989-992 ◽  
Author(s):  
Farough Nasiri ◽  
Amin Zolali ◽  
Sajad Asadbegi
Keyword(s):  
Solvent Free ◽  
One Pot ◽  
One Pot Synthesis
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