Showing posts with label Esterification. Show all posts
Showing posts with label Esterification. Show all posts

Thursday, 14 December 2023

Exploring the Potential of Ester Prodrugs of NSAIDs: A Comprehensive Overview | Chapter 12 | Advanced Concepts in Pharmaceutical Research Vol. 3

 Prodrugs are bioreversible compounds of pharmacologically alive substances that must meet with an in vivo enzymatic and/or synthetic change to release the parent drug and produce the intended effect. The drug's pharmacological project is hidden in a prodrug and renewed via something which incites activity-mediated bioconversion. The exercise of the prodrug strategy allows the manipulation of a drug's solubility, synthetic stability, reduce presystemic absorption, andtargeting towards specific sites. Specific type of prodrugs are ester prodrugs, that are most commonly able by combining drugs accompanying carboxylic acid group and drugs containing alcoholic or phenolic groups indifferent esterification conditions. Skilled are literatures that extensively examine NSAID-ester prodrugs. Esterification of NSAIDs masks the free carboxylic acid group, reducing gastrointestinal aftereffects. The sustained release can disclose the reduced reactions. Ester prodrugs have the potential to be exploited for the purpose of modifying or changing drug characteristics, accordingly holding promise for future requests.

Author(s) Details:

ManojKumar Sahoo,
Department of Pharmacy, Guru Ghasidas Vishwavidyalaya, Bilaspur (C.G.) - 495009, India.

Nidhi Agrawal,
Department of Pharmacy, Guru Ghasidas Vishwavidyalaya, Bilaspur (C.G.) - 495009, India.

Meenakshi Jaiswal,
Department of Pharmacy, Guru Ghasidas Vishwavidyalaya, Bilaspur (C.G.) - 495009, India.

S. K. Lanjhiyana,
Department of Pharmacy, Guru Ghasidas Vishwavidyalaya, Bilaspur (C.G.) - 495009, India.

Please see the link here: https://stm.bookpi.org/ACPR-V3/article/view/12713

Saturday, 30 September 2023

Biofunctional Textiles with Inclusion Complexes of Citronella Oil with β-Cyclodextrin | Chapter 3 | Novel Aspects on Chemistry and Biochemistry Vol. 7

 Integrated cure delivery arrangements in biofunctional textiles can aid in the battle against vector-carried illnesses. Instead of utilizing DEET (N,N-diethyl-m-methylbenzamide), which has disadvantages such poisonous responses and skin damage, you can utilize unwelcome made from plants and oils. However, in accordance with some masters, there are instances place essential oils are useless because of issues accompanying uncontrolled release. This study look at how citronella lubricate (OC) complexed with -cyclodextrin (CD) controlled the demeanor of cotton (COT) and polyester (PES) fabrics. The findings show that covering cotton and polyester accompanying -cyclodextrin complexes enables control over the essential lubricate's release mechanism from the material. Optical microscopy, SEM, and FTIR were used to evaluate the aggregates created; UV spectroscopy was used to decide the yield of complex formation; and controlled release was completed activity in vitro. Oil complexation accompanying CD had a yield of 63.79%, and it was found that when used to textiles, the release, that had previously been calculated in seconds, had changed to hours. The judgments indicate that aggregates, when modified with synthetic crosslinking agents, perform to offer a potential basis for immobilizing oils and organizing their release.

Author(s) Details:

Manuel J. Lis,
Institute of Textile Research and Cooperation of Terrassa, Polytechnic University of Catalonia, C/Colom 15, Terrassa, 08222 Barcelona, Spain.

Óscar García Carmona,
Institute of Textile Research and Cooperation of Terrassa, Polytechnic University of Catalonia, C/Colom 15, Terrassa, 08222 Barcelona, Spain.

Carlos García Carmona,
Institute of Textile Research and Cooperation of Terrassa, Polytechnic University of Catalonia, C/Colom 15, Terrassa, 08222 Barcelona, Spain.

Fabricio Maestá Bezerra,
Textile Engineering, Federal University of Technology-Paraná, 635 Marcilio Dias St., Apucarana 86812-460, Parana, Brazil.

Please see the link here: https://stm.bookpi.org/NACB-V7/article/view/11961

Saturday, 28 May 2022

Catalytic Esterification of Palm Fatty Acid Distillate to Produce Fatty Acid Methyl Ester| Chapter 8 | New Trends in Physical Science Research Vol.4

The esterification process produces biodiesel, commonly known as fatty acid methyl ester (FAME), a form of industrial and transportation fuel. In this work, a chromium-titanium mixed oxides catalyst generated by the sol-gel technique was used to catalyse the esterification of palm fatty acid distillate (PFAD) to yield FAME. A batch reactor was used to carry out the esterification procedure. The researchers wanted to see how reaction temperature, methanol to PFAD molar ratio, reaction duration, and catalyst reusability affected PFAD esterification. With a reaction temperature of 160°C, a methanol to PFAD molar ratio of 3:1, and a reaction period of 3 hours, the highest FAME content of 89 percent was produced. In the intervals between the first and third runs, With a 20% performance drop, the catalyst can be reused three times. The findings showed that Cr-Ti mixed oxides might be employed as a heterogeneous catalyst in the esterification of PFAD feedstock with a high acid value.


Author(s) Details:

W. Z. Wan Kamis,
Centre for Chemical Engineering Studies, Universiti Teknologi MARA, Cawangan Pulau Pinang, Permatang Pauh Campus, 13500 Pulau Pinang, Malaysia.

W. N. Azuwar,
Centre for Chemical Engineering Studies, Universiti Teknologi MARA, Cawangan Pulau Pinang, Permatang Pauh Campus, 13500 Pulau Pinang, Malaysia.

N. A. Ali Bashah,
Centre for Chemical Engineering Studies, Universiti Teknologi MARA, Cawangan Pulau Pinang, Permatang Pauh Campus, 13500 Pulau Pinang, Malaysia.

N. Isa,
Centre for Chemical Engineering Studies, Universiti Teknologi MARA, Cawangan Pulau Pinang, Permatang Pauh Campus, 13500 Pulau Pinang, Malaysia.

S. S. A. Syed-Hassan,
School of Chemical Engineering, College of Engineering, Universiti Teknologi MARA, 40450 Shah Alam, Selangor, Malaysia.

Please see the link here: https://stm.bookpi.org/NTPSR-V4/article/view/6935

Monday, 28 February 2022

Environmentally Benign Un-Catalyzed Esterification of Alcohols under Solvent-Free Condition Using Acetyl Chloride: An Experimental Investigation| Chapter 3 | Recent Trends in Chemical and Material Sciences Vol.6

 Under solvent-free and energy-efficient circumstances, a generic and practicable approach for un-catalyzed esterification of alcohols using acetyl chloride is disclosed. Nowadays, catalyst- and solvent-free processes are far more safe, nontoxic, ecologically friendly, and cost-effective. This approach is economical and environmentally friendly due to its high yields, extensive applicability to diverse alcohols, mild reaction conditions, short reaction time, and ease of operation. Because of the benefits of the approach, which include solvent-free, catalyst-free, energy-efficient, and ecologically friendly circumstances, a simple work-up procedure, and easy and green separation of the produced HCl, this protocol will be a green technology for practical organic synthesis.

Author(s) Details:

Sangita S. Makone,
Chemical Sciences Research Laboratory, Swami Ramanand Teerth Marathwada University, Vishnupuri, Nanded. Maharashtra, India.

Sandeep N. Niwadange,
Department of Chemistry, Shri Govindrao Munghate Art’s and Science College, Kurkheda, Gadchiroli, Maharashtra, India.

Please see the link here: https://stm.bookpi.org/RTCAMS-V6/article/view/5784

Thursday, 16 December 2021

Deposition of Triterpenoids and Steroids in Cuticular Waxes of Representative Fruits of Rosaceae Family during Their Development and Maturation | Chapter 9 | New Innovations in Chemistry and Biochemistry Vol. 5

 Many chemical changes occur during fruit ripening, not only in the mesocarp but also in the epicarp, such as changes in triterpenoid and steroid content of fruit cuticular waxes, which can alter pathogen susceptibility and mechanical qualities of the fruit surface. However, research into the links between fruit cuticular composition, ripening-related changes, and the consequent fruit attributes, such as post-harvest quality, is still in its early stages. Meanwhile, cuticular composition and developmental patterns may have a significant impact on cultivation and post-harvest methods, such as pesticide reduction and the use of artificial fruit coatings. The Rosaceae family is a large angiosperm family that includes several economically important fruit crops. The goal of this study was to determine the ripening-related variations in triterpenoid and steroid content of fruit cuticular waxes of three Rosaceae plant species: rugosa rose (Rosa rugosa), black chokeberry (Aronia melanocarpa var. "Galicjanka"), and apple (Malus domestica var. "Antonovka"). A GC-MS/FID method was used to assess the triterpenoid and steroid content in chloroform-soluble cuticular waxes at four different phenological stages. In chosen fruit samples with triterpenoids of ursane-, oleanane-, and lupane-type carbon skeletons, the prevalence of ursolic acid, and the composition of steroids, the profile of discovered chemicals was quite comparable. There was a steady enrichment of the content of triterpenoids and steroids in fruit cuticular wax, as well as an increasing accumulation of these chemicals. Modifications in metabolic pathways, particularly hydroxylation and esterification, resulted in alterations in triterpenoid concentration, which can modify interactions with complementary functional groups of aliphatic constituents and lead to significant changes in fruit surface quality.


Author(S) Details

Soyol Dashbaldan
Department of Plant Biochemistry, Institute of Biochemistry, Faculty of Biology, University of Warsaw, 1 Miecznikowa Street, 02-096 Warsaw, Poland and Mongolian University of Science and Technology, School of Industrial Technology, 8nd khoroo, Baga Toiruu 34, Sukhbaatar District, Ulaanbaatar 14191, Mongolia.

Cezary Paczkowski
Department of Plant Biochemistry, Institute of Biochemistry, Faculty of Biology, University of Warsaw, 1 Miecznikowa Street, 02-096 Warsaw, Poland.

Anna Szakiel
Department of Plant Biochemistry, Institute of Biochemistry, Faculty of Biology, University of Warsaw, 1 Miecznikowa Street, 02-096 Warsaw, Poland.

View Book:- https://stm.bookpi.org/NICB-V5/article/view/5150

Friday, 5 March 2021

An Efficient Oxone-Mediated Esterification of Aldehydes Using Indium(III) Triflate | Chapter 8 | Current Perspectives on Chemical Sciences Vol. 9

 Indium has the atomic number 49 and is found in group 13 of the periodic table of elements. Indium is a chemical element that belongs to the post-transition metals group. Indium has a silvery-white appearance, is light, and has a high malleability. While indium is a relatively rare element, it is used in a variety of industries around the world. Indium was discovered in 1863 by German metallurgists. However, it wasn't until the early 1990s that scientists working in the area of synthetic organic chemistry attempted serious research into the functions of indium and indium-related reagents. Many recent studies focusing on indium or indium-related reagents have resulted in important advances in synthetic organic chemistry. A growing number of useful chemical transformations involving indium or indium-related reagents have been discovered and published. Chemical transformations of reactive functional groups are crucial, particularly for the effective implementation of a series of multistep chemical schemes. A number of strategic reaction methodologies, including those involving indium or indium-related reagents, have been developed for this purpose. Indium metal has been found to be useful for protecting and deprotecting functional groups, and trivalent indium Lewis acids have been found to be useful in a wide range of chemical transformations. This chapter describes an effective oxone-mediated esterification of aldehydes using indium(III) triflate, a Lewis acid with three valences. Aromatic and heterocyclic aldehydes are the most commonly esterified. The findings demonstrate the efficacy of this esterification process and point to the potential for further production of these reagents in the field of synthetic organic chemistry.

Author (s) Details

Tomoko Mineno
Takasaki University of Health and Welfare, Japan.

View Book :- https://stm.bookpi.org/CPCS-V9/issue/view/44