Methods for direct conversion of primary nitroalkanes to nitriles

2021 ◽  
Vol 25 ◽  
Author(s):  
Muthupandian Ganesan
Keyword(s):  
Direct Synthesis ◽  
Direct Conversion ◽  
Research Paper ◽  
Nitro Compounds ◽  
Review Article ◽  
Present Review ◽  
Alkyl Nitrites ◽  
Comprehensive Information ◽  
Alternative Approach ◽  
Metal Catalyzed

: In recent years, reductive dehydration of primary nitro compounds has been demonstrated as an attractive and alternative approach for the direct synthesis of nitriles. Although scattered information on the conversion of alkyl nitrites and/or nitroalkanes to the corresponding nitriles has been reported in the literature, a research paper describing comprehensive information at one place is scarce. The present review has attempted to focus on the uncatalyzed as well as catalyzed reductive dehydration of nitro compounds directly into nitriles in the presence of dehydrating reagents. Non-metal and metal-catalyzed dehydration of nitro compounds and the use of radical chemistry in accessing nitriles have been highlighted in this review article.

Organo or Metal Complex Catalyzed Synthesis of Five-membered Oxygen Heterocycles

2020 ◽  
Vol 23 (25) ◽  
pp. 2822-2847
Author(s):  
Navjeet Kaur ◽  
Neha Ahlawat ◽  
Pooja Grewal ◽  
Pranshu Bhardwaj ◽  
Yamini Verma
Keyword(s):  
Organic Chemistry ◽  
Metal Complex ◽  
Review Article ◽  
Organic Reactions ◽  
Present Review ◽  
Oxygen Heterocycles ◽  
Organic Chemist ◽  
Metal Catalyzed

: The reactions involving the formation of C-O bond using metal as a catalyst have emerged to be one of the most influential reactions for the synthesis of heterocycles in modern organic chemistry. Catalysis by metals offers diverse opportunities to invent new organic reactions with a promising range of selectivities such as chemoselectivity, regioselectivity, diastereoselectivity, and enantioselectivity. The methodologies used earlier for synthesis were less approachable to the organic chemist because of their high cost, highly specified instrumentation and inconvenient methods. For both stereoselective and regioselective formation of five-membered O-containing heterocycles, cyclic reactions that are metal and non-metal-catalyzed have known to be very efficient. The present review article covers the applications of metal and non-metal as a catalyst for the synthesis of five-membered O-containing heterocycles.

Ahara as Pathya and Apathya in Amlapitta - A Review.

2017 ◽  
Vol 2 (1) ◽  
Author(s):  
Rakshith . ◽  
Shivakumar . ◽  
Sreeharsha . ◽  
Divyasree .
Keyword(s):  
Physical Health ◽  
Review Article ◽  
The Other ◽  
Social Health ◽  
Present Review ◽  
Common Disease ◽  
The Core ◽  
Common Disorder ◽  
The Common

The core principles in Ayurveda give prime importance to Agni, Prakriti, Ahara (food) and Vihara (lifestyle) in maintaining health. Present era people are scheduled to one or the other works due to which they are following unrightful food and habits which lead the manifestation of one of the common disorder which troubles person a lot - Amlapitta. By excess “Hurry, Worry and Curry” GIT disorders are the most common, not only affecting physical health but also psychological and social health. Amlapitta is one of that and it is a burning problem of the whole World. Amalpitta is composed of word Amla and Pitta. Amlapitta is a very common disease caused by Vidagdha Pitta with features like Amlodgara, Tiktodgara, Hrit, Kantha Daha etc. Pathya recommended in Amlapitta are Yava, Godhuma, Purana Shali, Mudga Yusha, Lajasaktu etc. Apathya recommended in Amlapitta are Navanna, Avidugdha, Masha, Kulattha, Dadhi and etc. So this present review article throws light on Pathya (conducive) and Apathya (non conducive) in Amlapitta.

scholarly journals Microencapsulation of Flaxseed Oil—State of Art

Processes ◽  
2021 ◽  
Vol 9 (2) ◽  
pp. 295
Author(s):  
Asma Yakdhane ◽  
Sabrine Labidi ◽  
Donia Chaabane ◽  
Anita Tolnay ◽  
Arijit Nath ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Gum Arabic ◽  
Tween 80 ◽  
Flaxseed Oil ◽  
Review Article ◽  
Wall Material ◽  
Physico Chemical ◽  
Comprehensive Information ◽  
The Matrix

Microencapsulation is a well-known technology for the lipid delivery system. It prevents the oxidation of fatty acids and maintains the quality of lipid after extraction from oil seed and processing. In flaxseed oil, the amount of ω-3 and ω-6 polyunsaturated fatty acids are 39.90–60.42% and 12.25–17.44%, respectively. A comprehensive review article on the microencapsulation of flaxseed oil has not been published yet. Realizing the great advantages of flaxseed oil, information about different technologies related to the microencapsulation of flaxseed oil and their characteristics are discussed in a comprehensive way, in this review article. To prepare the microcapsule of flaxseed oil, an emulsion of oil-water is performed along with a wall material (matrix), followed by drying with a spray-dryer or freeze-dryer. Different matrices, such as plant and animal-based proteins, maltodextrin, gum Arabic, and modified starch are used for the encapsulation of flaxseed oil. In some cases, emulsifiers, such as Tween 80 and soya lecithin are used to prepare flaxseed oil microcapsules. Physico-chemical and bio-chemical characteristics of flaxseed oil microcapsules depend on process parameters, ratio of oil and matrix, and characteristics of the matrix. As an example, the size of the microcapsule, prepared with spray-drying and freeze-drying ranges between 10–400 and 20–5000 μm, respectively. It may be considered that the comprehensive information on the encapsulation of flaxseed oil will boost the development of functional foods and biopharmaceuticals.

Manganese-based advanced nanoparticles for biomedical applications: future opportunity and challenges

Nanoscale ◽  
2021 ◽  
Author(s):  
Shagufta Haque ◽  
Sanchita Tripathy ◽  
Chitta Ranjan Patra
Keyword(s):  
Biomedical Applications ◽  
Review Article ◽  
Present Review ◽  
Future Opportunity

The present review article provides the insight of an overall survey on the recent advancements of manganese nanomaterials for biomedical nanotechnology and other fields.

scholarly journals Heterobiaryl synthesis by contractive C–C coupling via P(V) intermediates

Science ◽  
2018 ◽  
Vol 362 (6416) ◽  
pp. 799-804 ◽  
Author(s):  
Michael C. Hilton ◽  
Xuan Zhang ◽  
Benjamin T. Boyle ◽  
Juan V. Alegre-Requena ◽  
Robert S. Paton ◽  
...  
Keyword(s):  
Cross Coupling ◽  
The Other ◽  
Coupling Reactions ◽  
Mechanistic Studies ◽  
Alternative Approach ◽  
Metal Catalyzed ◽  
Polar Functional Groups ◽  
Pharmacological Function ◽  
Complex Drug ◽  
Acidic Alcohol

Heterobiaryls composed of pyridine and diazine rings are key components of pharmaceuticals and are often central to pharmacological function. We present an alternative approach to metal-catalyzed cross-coupling to make heterobiaryls using contractive phosphorus C–C couplings, also termed phosphorus ligand coupling reactions. The process starts by regioselective phosphorus substitution of the C–H bonds para to nitrogen in two successive heterocycles; ligand coupling is then triggered via acidic alcohol solutions to form the heterobiaryl bond. Mechanistic studies imply that ligand coupling is an asynchronous process involving migration of one heterocycle to the ipso position of the other around a central pentacoordinate P(V) atom. The strategy can be applied to complex drug-like molecules containing multiple reactive sites and polar functional groups, and also enables convergent coupling of drug fragments and late-stage heteroarylation of pharmaceuticals.

scholarly journals AMAZING ANTIMICROBIAL AND WOUND HEALING POTENTIAL OF ACACIA CATECHU BARK EXTRACTS- A REVIEW

2021 ◽  
pp. 1-7
Author(s):  
ARCHANA TIWARI ◽  
AVINASH TIWARI
Keyword(s):  
Wound Healing ◽  
Secondary Metabolites ◽  
Review Article ◽  
Present Review ◽  
Skin Infections ◽  
Bioactive Components ◽  
Medicinal Properties ◽  
Pathogenic Microbes ◽  
Acacia Catechu ◽  
Physiological Reactions

Plants are not only the source of food, oxygen, and shelter, but the same are also a potential foundation of medicines. Many natural and plant-derived antimicrobial and wound healing compounds have been recognized. In the present review, we have studied the main bioactive components of Acacia catechu with their medicinal roles. Most of these bioactive components are secondary metabolites which are produced by plants as side products of certain physiological reactions and are of no use for the plant itself. These components have been reported for their medicinal properties. In this review, we have mentioned some antibacterial, antifungal, and wound healing properties of A. catechu with its known bioactive components. The aim of this review article is, to enlist the possible potent bioactive components of the plant, against pathogenic microbes that can replace the use of chemicals and synthetic antibiotics for the treatment of skin infections and other diseases.

scholarly journals Luminol in the forensic science

2012 ◽  
Vol 3 (4) ◽  
pp. 172-177 ◽  
Author(s):  
Rafaela Rogiski Da Silva ◽  
Bruna Carla Agustini ◽  
André Luís Lopes Da Silva ◽  
Henrique Ravanhol Frigeri
Keyword(s):  
Forensic Science ◽  
Light Emission ◽  
Occult Blood ◽  
Crime Scene ◽  
Review Article ◽  
Laboratory Analysis ◽  
Present Review ◽  
Sensitive Test ◽  
The Real ◽  
Final Verdict

In a crime scene, the collection of evidence and a subsequent laboratory analysis compose the fundamental steps to allow the expert to reveal the truth for the final verdict in a jury and to bring back the comfort to the victim’s family. Bloodstains are usually found and sent to laboratories as a vestige to unravel the origin of the material. However, some scenes are modified in order to conceal the real culprit for the criminal act. For these cases, the luminol reagent can be useful. This test is very often used to visualize occult blood. Luminol is considered the most sensitive test once it can identify the blood presence in scale of nanograms. When this reagent comes into contact with blood,the light emission occurs through a phenomenon known as  chemiluminescence. This luminescence can be produced by other interfering compounds, leading to a misinterpretation for the presence of blood. Despite this shortcoming, the present review article highlights the indispensability of the reagent luminol on a crime scene.

scholarly journals A Reviews on Behaviour of Industrial Chimneys

2020 ◽  
pp. 118-120
Author(s):  
Sachin Mutkure ◽  
Rashmi Bharatey ◽  
Dilip Mase
Keyword(s):  
Review Paper ◽  
Research Paper ◽  
Model Analysis ◽  
Review Article ◽  
Seismic Zone ◽  
Time Model ◽  
Geometrical Condition ◽  
Software Analysis ◽  
Seismic Force ◽  
Modelling Methodology

Review article contains various research paper related to the topic chimney and forces acting on it like the seismic force, earthquake forces as well as geographical condition, fundamental time, model analysis and software analysis and modelling of the chimney. Various software is used to analysis and modelling of the chimney.in this paper discuss various modelling concept and problem behind them. The purposes of this paper are to identify the problem associate with a chimney as per Indian geometrical condition as well as the seismic zone in India. This review paper help to improve knowledge regarding design and modelling methodology aspects.

Prominence of Oxidative Stress in the Management of Anti-tuberculosis Drugs Related Hepatotoxicity

2020 ◽  
Vol 13 (2) ◽  
pp. 95-101 ◽  
Author(s):  
Preena John ◽  
Pravin P. Kale
Keyword(s):  
Oxidative Stress ◽  
Membrane Permeability ◽  
Signaling Pathway ◽  
Critical Condition ◽  
Permeability Transition ◽  
Review Article ◽  
Present Review ◽  
Membrane Permeability Transition ◽  
Hepatic Glutathione

: Advanced medical services and treatments are available for treating Tuberculosis. Related prevalence has increased in recent times. Unfortunately, the continuous consumption of related drugs is also known for inducing hepatotoxicity which is a critical condition and cannot be overlooked. The present review article has focused on the pathways causing these toxicities and also the role of enzyme CYP2E1, hepatic glutathione, Nrf2-ARE signaling pathway, and Membrane Permeability Transition as possible targets which may help in preventing the hepatotoxicity induced by the drugs used in the treatment of tuberculosis.

Task-specific Ionic Liquids as a Green Catalysts and Solvents for Organic Synthesis

2020 ◽  
Vol 7 (1) ◽  
pp. 105-119 ◽  
Author(s):  
Swapnil A. Padvi ◽  
Dipak S. Dalal
Keyword(s):  
Ionic Liquids ◽  
Physical Properties ◽  
Organic Synthesis ◽  
Review Article ◽  
Present Review ◽  
Organic Transformations ◽  
The Past ◽  
Properties Characterization

Task-specific ionic liquids (TSILs) have received increased attention over the past few years as a Green Catalysts and Solvents for a large number of organic transformations. The present review article aims to provide an introduction, types of task-specific ionic liquids, preparation/synthesis, physical properties, characterization, use of TSILs as solvent and catalyst in organic synthesis.

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