scholarly journals GREEN CHEMISTRY APPLICATION FOR THE SYNTHESIS OF (1)-N-4’-METHOXYBENZYL-1,10-PHENANTHROLINIUM BROMIDE

2010 ◽  
Vol 8 (3) ◽  
pp. 423-425 ◽  
Author(s):  
Maulidan Firdaus ◽  
Jumina Jumina ◽  
Chairil Anwar
Keyword(s):  
Green Chemistry ◽  
Energy Efficient ◽  
Solvent Free ◽  
Free Treatment ◽  
Synthetic Procedure

A simple, energy-efficient, and relatively quick synthetic procedure for the synthesis of (1)-N-4'-methoxybenzyl-1,10-phenanthrolinium bromide, based on green chemistry principles has been carried out. The synthesis was started by solvent-free reduction of p-anisaldehyde with NaBH4 to give 4-methoxybenzyl alcohol in 98% yield to be followed by solvent-free treatment of the resulted alcohol with PBr3 to yield 4-methoxybenzyl bromide (86%). Furthermore, the obtained bromide was reacted with 1,10-phenanthroline in acetone at reflux for 12 h to give the phenanthrolinium salt target in 68% yield.   Keywords: green chemistry, p-anisaldehyde, (1)-N-4'-methoxybenzyl-1,10-phenanthrolinium bromide

scholarly journals Green-chemistry Compatible Approach to TiO2-supported PdAu Bimetallic Nanoparticles for Solvent-free 1-Phenylethanol Oxidation under Mild Conditions

2015 ◽  
Vol 7 (3) ◽  
pp. 307-315 ◽  
Author(s):  
Jian-Bing Chang ◽  
Chang-Hai Liu ◽  
Jie Liu ◽  
Yu-Yan Zhou ◽  
Xu Gao ◽  
...  
Keyword(s):  
Green Chemistry ◽  
Bimetallic Nanoparticles ◽  
Solvent Free ◽  
Mild Conditions

scholarly journals Barium Dichloride as a Powerful and Inexpensive Catalyst for the Pechmann Condensation without Using Solvent

2012 ◽  
Vol 2012 ◽  
pp. 1-5 ◽  
Author(s):  
Saeed Khodabakhshi
Keyword(s):  
Green Chemistry ◽  
Organic Solvents ◽  
Condensation Reaction ◽  
Reaction Times ◽  
Solvent Free ◽  
Coumarin Derivatives ◽  
Inexpensive Method ◽  
Keto Esters ◽  
Pechmann Condensation ◽  
Solvent Free Conditions

Various coumarin derivatives have been efficiently synthesized via barium dichloride-catalyzed Pechmann condensation reaction of various phenols and β-keto esters under solvent-free conditions. This novel and inexpensive method has advantages such as short reaction times, excellent product yields, and avoidance of organic solvents in agreement with green chemistry principles.

scholarly journals PRACTICAL APPROACH TO GREEN CHEMISTRY

2017 ◽  
Vol 9 (4) ◽  
pp. 10 ◽  
Author(s):  
Meena Bhandari ◽  
Seema Raj
Keyword(s):  
Green Chemistry ◽  
Energy Efficient ◽  
Chemical Compounds ◽  
Practical Approach ◽  
Pharmaceutical Chemistry ◽  
Atom Economy ◽  
Basic Principles ◽  
Drug Molecules ◽  
Laboratory Manuals

Objective: The basic principles of green chemistry addresses various issues related to synthesis of chemical compounds: planning organic synthesis to maximise yield, prevention/minimization of waste, atom economy, the use of less lethal chemicals, use of safer solvents, renewable starting materials, energy efficiency and use of green catalysts. The objective of this study is to elaborate the practical approach of green methods.Methods: In this paper, we elucidate some important common syntheses having green procedures which can be used in the fields of pharmaceutical chemistry and other fields as well.Results: Green chemistry principles follow up to reduce pollution and environmental degradation by utilizing eco-friendly, non-hazardous, reproducible and efficient solvents and catalysts in the synthesis of drug molecules, drug intermediates and in researches involving synthetic chemistry. The paper also approaches green methods in which microwave radiation can be used as an energy efficient tool.Conclusion: Experimental procedures are gathered from educational journals and laboratory manuals and are viewed in the light of efficacy of green chemistry principles.

Catalyst- and Solvent-Free Hydrophosphorylation of Ketones with Secondary Phosphine Oxides: Green Synthesis of Tertiary α-Hydroxyphosphine Oxides

Synthesis ◽  
2020 ◽  
Vol 52 (15) ◽  
pp. 2224-2232
Author(s):  
Boris A. Trofimov ◽  
Nina K. Gusarova ◽  
Nina I. Ivanova ◽  
Kseniya O. Khrapova ◽  
Pavel A. Volkov ◽  
...  
Keyword(s):  
Hydrogen Bond ◽  
Green Chemistry ◽  
Green Synthesis ◽  
Quantum Chemical Calculations ◽  
Quantum Chemical ◽  
Solvent Free ◽  
Secondary Phosphine ◽  
Phosphine Oxides ◽  
Intramolecular Hydrogen ◽  
Solvent Free Reaction

Tertiary α-hydroxyphosphine oxides have been synthesized via the catalyst- and solvent-free reaction between available secondary phosphine oxides and aliphatic, aromatic and heteroaromatic ketones at 20–62 °C in near to 96–98% yield. The developed method meets the requirements of green chemistry and the PASE (pot, atom, step economy) paradigm. According to quantum-chemical calculations at the B3LYP/6-311++G(d,p) level, the synthesized hydroxyphosphine oxides feature a weak (≈3 kcal·mol–1) O−H···O=P intramolecular hydrogen bond.

Solvent-free reactions as green chemistry procedures for the synthesis of cosmetic fatty esters

2003 ◽  
Vol 5 (5) ◽  
pp. 623 ◽  
Author(s):  
C. Villa ◽  
E. Mariani ◽  
A. Loupy ◽  
C. Grippo ◽  
G. C. Grossi ◽  
...  
Keyword(s):  
Green Chemistry ◽  
Solvent Free ◽  
Fatty Esters
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