scholarly journals Expeditious, Mild and Solvent Free Synthesis of Bis(indolyl)methanes, Using a Mixture of Phosphorus Pentoxide in Methanesulphonic Acid

2012 ◽  
Vol 9 (3) ◽  
pp. 1313-1319 ◽  
Author(s):  
Amulrao U. Borse ◽  
Mahesh N. Patil ◽  
Nilesh L. Patil
Keyword(s):  
Ambient Temperature ◽  
Phosphorus Pentoxide ◽  
Solvent Free ◽  
Efficient Synthesis ◽  
Free Condition ◽  
Solvent Free Condition ◽  
Solvent Free Synthesis

Highly rapid and efficient synthesis of Bis(indolyl)methanes has been developed by using a mixture of phosphorus pentoxide in methanesulphonic acid (Eaton’s reagent) at ambient temperature under solvent free condition.

scholarly journals Ultrasound-promoted solvent-free synthesis of some new α-aminophosphonates as potential antioxidants

2020 ◽  
Vol 43 (1) ◽  
pp. 147-153
Author(s):  
Meson Haji Basha ◽  
Chennamasetty Subramanyam ◽  
Kammela Prasada Rao
Keyword(s):  
Solvent Free ◽  
Good Activity ◽  
Efficient Synthesis ◽  
Free Condition ◽  
Solvent Free Condition ◽  
Spectral Characterisation ◽  
Work Up ◽  
Solvent Free Synthesis ◽  
In Vitro Antioxidant Activity

AbstractUltrasonic irradiation has been adopted in order to achieve an efficient synthesis of some novel α-aminophosphonates by Pudovik reaction. Major benefits of this method are as follows: eco-friendly, free of catalyst, high yielding, uncomplicated work-up procedure, short reaction time, and solvent free condition. Spectral characterisation and elemental analysis of the synthesized samples was carried out. In vitro antioxidant activity of the title compounds was screened by DPPH˙, O2-˙ and NO˙ scavenging methods. Good activity was shown by most of the compounds as compared with the standards.

Green and Efficient Synthesis of Xanthene Derivatives using 1-Butyl-3-methylimidazolium Bromide under Solvent Free Condition

2018 ◽  
Vol 3 (3) ◽  
pp. 95-97
Author(s):  
Virbhadra G. Kalalawe ◽  
Dashrath R. Munde ◽  
Raju P. Kagne ◽  
Sandeep N. Niwadange ◽  
Raoji D. Gutte
Keyword(s):  
Solvent Free ◽  
Efficient Synthesis ◽  
Free Condition ◽  
Solvent Free Condition ◽  
Xanthene Derivatives

scholarly journals A Facile One-Pot Solvent-Free Synthesis of 1,2-Dihydro-1-arylnaphtho[1,2-e][1,3]oxazine-3-ones Catalyzed by Wet Cyanuric Chloride

2013 ◽  
Vol 2013 ◽  
pp. 1-4 ◽  
Author(s):  
Firouzeh Nemati ◽  
Azam Beyzai
Keyword(s):  
Organic Solvent ◽  
Simple Procedure ◽  
Reaction Times ◽  
Solvent Free ◽  
Cyanuric Chloride ◽  
One Pot ◽  
Free Condition ◽  
Solvent Free Condition ◽  
High Yields ◽  
Solvent Free Synthesis

A novel one-pot synthesis of 1,2-dihydro-1-arylnaphtho[1,2-e][1,3]oxazine-3-ones by condensation of a variety of aldehydes withβ-naphthol and urea or thiourea in the presence of wet cyanuric chloride under solvent-free condition has been described. High yields, simple procedure, easy workup, short reaction times, and avoiding the use of organic solvent are the advantages of this green methodology.

Microwave-Assisted Efficient Synthesis of Dihydropyrimidines in Solvent-Free Condition.

ChemInform ◽  
2005 ◽  
Vol 36 (7) ◽  
Author(s):  
Maryam Mirza-Aghayan ◽  
Mohammad Bolourtchian ◽  
Maryam Hosseini
Keyword(s):  
Solvent Free ◽  
Efficient Synthesis ◽  
Free Condition ◽  
Microwave Assisted ◽  
Solvent Free Condition

scholarly journals Chitosan-silica Sulfate Nano Hybrid: An Efficient Biopolymer Based-heterogeneous Nano Catalyst for Solvent-free Synthesis of 3,4-Dihydropyrimidine-2(1H)-one/thiones

2021 ◽  
Vol 68 (2) ◽  
pp. 374-386
Author(s):  
Somayeh Behrouz ◽  
Masoome Nazar Abi ◽  
Mohammad Amin Piltan
Keyword(s):  
Biginelli Reaction ◽  
Reaction Times ◽  
Significant Loss ◽  
Solvent Free ◽  
Methyl Acetoacetate ◽  
Free Condition ◽  
Efficient Approach ◽  
Solvent Free Condition ◽  
Nano Catalyst ◽  
Solvent Free Synthesis

A green and highly efficient approach for the synthesis of 3,4-dihydropyrimidine-2(1H)-one/thione derivatives is described. In this approach, the three-component Biginelli reaction between (thio)urea, methyl acetoacetate and aldehydes under solvent-free condition in the presence of chitosan-silica sulfate nano hybrid (CSSNH) as a green and heterogeneous nano catalyst affords the corresponding products in good to excellent yields and in short reaction times. CSSNH is a cheap, eco-friendly, and non-toxic nano catalyst that could be easily prepared, handled, and reused for many reaction runs without significant loss of its activity.

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