Photocatalysis applied to organic synthesis – A green chemistry approach

2018 ◽  
Vol 10 ◽  
pp. 40-45 ◽  
Author(s):  
Clément Michelin ◽  
Norbert Hoffmann
Keyword(s):  
Green Chemistry ◽  
Organic Synthesis

Chiral imidazolidinones: A class of priviliged organocatalysts in stereoselective organic synthesis

2020 ◽  
Vol 5 (5) ◽  
Author(s):  
Laura Raimondi ◽  
Chiara Faverio ◽  
Monica Fiorenza Boselli
Keyword(s):  
Pharmaceutical Industry ◽  
Green Chemistry ◽  
Organic Synthesis ◽  
Catalytic Synthesis ◽  
Biological Chemistry ◽  
Chiral Molecules ◽  
Catalytic Systems ◽  
Drug Synthesis ◽  
Industry Needs

AbstractChiral molecules hold a mail position in Organic and Biological Chemistry, so pharmaceutical industry needs suitable strategies for drug synthesis. Moreover, Green Chemistry procedures are increasingly required in order to avoid environment deterioration. Catalytic synthesis, in particular organocatalysis, in thus a continuously expanding field. A survey of more recent researches involving chiral imidazolidinones is here presented, with a particular focus on immobilized catalytic systems.

scholarly journals Microwave Assisted Synthesis of Organic Compounds and Nanomaterials

2021 ◽  
Author(s):  
Anjali Jha
Keyword(s):  
Green Chemistry ◽  
Organic Synthesis ◽  
Electric Fields ◽  
Chemical Reactions ◽  
Dipole Moments ◽  
Electric Heating ◽  
Microwave Assisted Synthesis ◽  
Microwave Chemistry ◽  
Microwave Assisted ◽  
Promising Area

In the Conventional laboratory or industry heating technique involve Bunsen burner, heating mental/hot plates and electric heating ovens. To produce a variety of useful compounds for betterment of mankind, the Microwave Chemistry was introduced in year 1955 and finds a place in one of the Green chemistry method. In Microwave chemistry is the science of applying microwave radiation to chemical reactions. Microwaves act as high frequency electric fields and will generally heat any material containing mobile electric charges, such as polar molecules in a solvent or conducting ions in a solid. Polar solvents are heated as their component molecules are forced to rotate with the field and lose energy in collisions i.e. the dipole moments of molecules are important in order to proceed with the chemical reactions in this method. It can be termed as microwave-assisted organic synthesis (MAOS), Microwave-Enhanced Chemistry (MEC) or Microwave-organic Reaction Enhancement synthesis (MORE). Microwave-Assisted Syntheses is a promising area of modern Green Chemistry could be adopted to save the earth.

Microwave-assisted organic synthesis in Water

2021 ◽  
Vol 08 ◽  
Author(s):  
Geetanjali ◽  
Ram Singh
Keyword(s):  
Green Chemistry ◽  
Organic Synthesis ◽  
Negative Impact ◽  
Environmental Concern ◽  
Conventional Heating ◽  
Health It ◽  
Microwave Assisted ◽  
Important Principle ◽  
Environment And Health ◽  
Methods Of Synthesis

: Most of the traditional methods for organic synthesis have been associated with environmental concern. The transition from traditional to modern methods of synthesis is mainly based on principles of green chemistry to achieve better sustainability by reducing the negative impact on the environment and health. It has been found that microwaves as an energy source in organic synthesis have a great advantage over conventional heating. Microwave-assisted reactions are energy efficient and hence, brought themselves in the preview green chemistry principles. The use of safer solvents is another important principle of green chemistry. The use of water as a solvent in organic synthesis has great benefits over the use of hazardous organic solvents in terms of environment and safety. This study will cover the use of both microwave and water simultaneously in organic reactions.

scholarly journals Nucleophilic C–H functionalization of arenes: a new logic of organic synthesis

2017 ◽  
Vol 89 (8) ◽  
pp. 1195-1208 ◽  
Author(s):  
Oleg N. Chupakhin ◽  
Valery N. Charushin
Keyword(s):  
Electron Transfer ◽  
Green Chemistry ◽  
Nucleophilic Substitution ◽  
Organic Synthesis ◽  
Nucleophilic Substitution Of Hydrogen ◽  
Metal Free ◽  
Hydride Ion ◽  
Electrochemical Modeling ◽  
Leaving Groups ◽  
Concept Change

AbstractDirect metal-free C–H functionalization of arenes with nucleophiles is a new chapter in the chemistry of aromatics. Comprehensive studies on nucleophilic substitution of hydrogen in arenes (the SNH reactions), including mechanisms, intermediates, mathematic and electrochemical modeling, kinetics, electron-transfer, etc. have shown that this is not the hydride ion, but C–H proton is departed, and this process is facilitated by the presence of an appropriate oxidant or an auxiliary group. The SNH reactions, as a part of the general C–H functionalization concept, change the logic of organic synthesis. They open new opportunities, avoiding incorporation of good leaving groups or other auxiliaries in an aromatic ring, as a prefunctionalization step, thus providing a better correspondence to the principles of green chemistry.

scholarly journals A ABORDAGEM TELESCÓPICA COMO FERRAMENTA DA QUÍMICA VERDE

Química Nova ◽  
2021 ◽  
Author(s):  
Vitor Andrade ◽  
Marcio Mattos
Keyword(s):  
Green Chemistry ◽  
Organic Synthesis ◽  
Continuous Flow ◽  
Cost Savings ◽  
Cross Coupling ◽  
Waste Generation ◽  
One Pot ◽  
Sequential Reactions

THE TELESCOPIC APPROACH AS A TOOL FOR GREEN CHEMISTRY. One-pot reactions have become a powerful tool for the development of sustainable protocols in organic synthesis. In particular, the telescoping of multi-step reactions, i.e., the execution of sequential reactions without isolating and purifying intermediates, reduces the number of steps while preventing waste generation. Additionally, the processes become more sustainable through time, reagents/solvents, energy and cost savings. Therefore, the aim of this work is to summarize and discuss representative one-pot telescoped strategies involving heterocyclic construction, cross-coupling and continuous-flow reactions.

Laccase Catalysis

Biotechnology ◽  
2019 ◽  
pp. 2054-2089
Author(s):  
Helina Patel ◽  
Akshaya Gupte
Keyword(s):  
Green Chemistry ◽  
Molecular Oxygen ◽  
Organic Synthesis ◽  
Bioactive Compounds ◽  
Cost Effective ◽  
Biochemical Properties ◽  
Physico Chemical ◽  
Grafting Reactions ◽  
Increasing Demand ◽  
Made In

The search for cost-effective and environmental benign practices for the production of bioactive compounds has gained considerable attention since last decade, due to increasing demand of eco-friendly processes. Many industries have started adopting routes for the development of green chemistry by employing enzymatic approaches to overcome the limitations of physico-chemical methods and environmental concerns. Laccase is one such enzyme which has gained considerable attention in recent years as a biocatalyst in organic synthesis. Laccases possess versatile biochemical properties and the reactions catalyzed by laccase require only molecular oxygen with concomitant release of water as a byproduct. They have been widely used for reactions such as dimerization, polymerization, coupling, and grafting reactions and for antibiotic modifications. This chapter summarizes the advances that have been made in developing technologies based on laccase mediated reactions in the field of medicine, agriculture, food, and pharmaceuticals.

Lemon Juice: A versatile reusable biocatalyst for the synthesis of bioactive organic compounds as well as numerous nanoparticles based catalytic system

2021 ◽  
Vol 25 ◽  
Author(s):  
Yogesh Brijwashi Sharma ◽  
Bhakti Umesh Hirlekar ◽  
Yogesh P. Bharitkar ◽  
Abhijit Hazra
Keyword(s):  
Green Chemistry ◽  
Small Molecules ◽  
Organic Synthesis ◽  
Potential Role ◽  
Fruit Juice ◽  
Lemon Juice ◽  
Review Article ◽  
Organic Transformations ◽  
Environment Friendly ◽  
Principal Role

Green chemistry is an essential part of the chemistry for the organic synthesis and also plays a principal role to save the environment from the harmful and toxic catalysts. Fruit juice catalyzed chemistry is a vital part of green chemistry in which lemon juice play a potential role in a various organic transformations. This review article has been summarized (from 2011-2020) with the application and importance of lemon juice in synthetic organic transformation as well as synthesis of various type of nanoparticles and catalysts. This review article can help the researcher to develop the route for the synthesis of various scaffolds, small molecules, nanoparticles and catalysts under economical and environment friendly condition.

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