scholarly journals Solventless Synthesis of Imines Derived from Diphenyldisulphide Diamine or p-Vanillin

2009 ◽  
Vol 6 (s1) ◽  
pp. S195-S200 ◽  
Author(s):  
Dany Jean -Noël uppiah ◽  
Minu Gupta Bhowon ◽  
sabina Jhaumeer Laulloo
Keyword(s):  
Schiff Bases ◽  
Elemental Analysis ◽  
Environmental Contamination ◽  
Classical Method ◽  
Solvent Free ◽  
High Yield ◽  
Melting Points ◽  
Solvent Free Conditions ◽  
Solventless Synthesis

A solventless synthesis can reduce environmental contamination and can be more convenient than solvent-based synthesis. A series of Schiff bases were synthesized in high yield > 90% under solvent free conditions with negligible waste. All the synthesized products were characterized on the basis of spectral, elemental analysis and melting points and were compared with the data of the prouducts obtained from classical method

Aluminium complex-catalysed hydroboration of alkenes and alkynes

2019 ◽  
Vol 43 (26) ◽  
pp. 10531-10536 ◽  
Author(s):  
Adimulam Harinath ◽  
Indrani Banerjee ◽  
Jayeeta Bhattacharjee ◽  
Tarun K. Panda
Keyword(s):  
Solvent Free ◽  
High Yield ◽  
Boronate Esters ◽  
Solvent Free Conditions ◽  
Terminal Alkenes

Catalytic hydroboration of terminal alkenes/alkynes with HBpin using the Al(III) catalyst, [κ2-{Ph2P(=Se)NCH2(C5H4N)}Al(CH3)2] (1), under mild and solvent-free conditions to afford corresponding alkyl/alkenyl boronate esters in high yield is reported.

scholarly journals A Facile Solvent Free Synthesis of 3-arylidenechroman-4-ones Using Grinding Technique

2012 ◽  
Vol 9 (3) ◽  
pp. 1251-1256 ◽  
Author(s):  
Suresh Kumar ◽  
Jagdish K. Makrandi
Keyword(s):  
Polyphosphoric Acid ◽  
Cold Water ◽  
Aromatic Aldehydes ◽  
Solvent Free ◽  
Environmentally Benign ◽  
High Yield ◽  
Solvent Free Conditions ◽  
Microwave Irradiations ◽  
Grinding Technique ◽  
Solvent Free Synthesis

An efficient method for the synthesis of 3-arylidenechroman-4-ones has been developed under solvent free conditions using grinding technique. Grinding of variously substituted chroman-4-ones with aromatic aldehydes in presence of anhydrous barium hydroxide at room temperature give 3-arylidenechroman-4-ones in high yield (75-92%). Products are obtained by just acidification of the reaction mixture in ice cold water. Reaction in solid state, with enhanced rate, high selectivity and manipulative simplicity are the attractive features of this environmentally benign protocol. The chroman-4-one derivatives required for the reaction have been obtained by polyphosphoric acid (PPA) catalysed cyclisation of phenoxypropanoic acids under microwave irradiations.

scholarly journals One Pot, Solvent-Free Synthesis of Substituted 3,4-Dihydropyrimidin-2(1H)-Ones/Thiones under Microwave Irradiation (CEM) Using Reusable Nickel Nanoparticles

2015 ◽  
Vol 50 ◽  
pp. 17-25 ◽  
Author(s):  
Mayur K. Vekariya ◽  
Rajesh H. Vekariya ◽  
Nirav N. Barot ◽  
Tauhid A. Shaikh ◽  
Harjinder Kaur ◽  
...  
Keyword(s):  
Microwave Irradiation ◽  
Nickel Nanoparticles ◽  
Condensation Reaction ◽  
Solvent Free ◽  
High Yield ◽  
One Pot ◽  
Mass Spectral ◽  
Keto Esters ◽  
Aryl Aldehydes ◽  
Solvent Free Conditions

A library of 3,4-dihydropyrimidin-2(1H)-ones/thiones derivatives were synthesized via Biginelli condensation reaction of β-keto esters, aryl aldehydes and urea/thiourea under solvent-free conditions utilizing nickel nanoparticles under microwave irradiation (CEM Discover). The structures of the all compounds were elucidated with the aid of elemental analysis, IR, 1H-NMR and Mass spectral data. Nickel nanoparticles can be recovered and reused five times without loss of their efficiency. Short reaction time, high yield of products and simple workup procedure, solvent-free conditions and reusability of the catalyst are the superior features of this protocol.

An imidazolin-2-iminato ligand organozinc complex as a catalyst for hydroboration of organic nitriles

2019 ◽  
Vol 43 (43) ◽  
pp. 16812-16818 ◽  
Author(s):  
Suman Das ◽  
Jayeeta Bhattacharjee ◽  
Tarun K. Panda
Keyword(s):  
Solvent Free ◽  
High Yield ◽  
Solvent Free Conditions

Catalytic hydroboration of nitriles with pinacolborane (HBpin) using the imidazolin-2-iminato zinc alkyl complex [{(ImtBuN)Zn(CH2CH3)}2] (1c) under mild and solvent-free conditions to afford corresponding diboronate esters in high yield is reported.

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