Medicinal chemistry is the branch of chemistry that deals with the discovery, design and development of therapeutic chemical agents for use in clinical and veterinary medicine. It deals with the relationship between chemical structure and biological activity, medicinal chemistry as a scientific discipline has introduced several new techniques over the last few years in order to speed up the drug discovery process, such as combinatorial chemistry, microwave-assisted organic synthesis, and high-throughput purification.
Synthetic organic chemistry has always been a vital part of the highly integrated and multidisciplinary process of drug development. However, the nature of its major contribution has varied over time. In recent years, efforts have been made to synthesize potential anticancer, anti microbial, anti hiv drugs. Consequently, hundreds of chemical variants of known classes of therapeutic agents have been synthesized. Recent advances in biomedical sciences and combinatorial chemistry have resulted in the design and synthesis of hundreds of new anti microbial agents with potential activity against wide range of therapeutic targets
Table of Contents
1 Coumarin - A boon to Earth
1.1 Introduction
1.2 History
1.3 Brief view of Discoveries[5]
1.3.1 Medicine in the antiquity
1.3.2 Medicine in the Middle Ages (400 to 1500 AC)
1.4 Discovery of Penicillin
1.5 The general stages in modern-day drug discovery and design
2 REVIEW OF LITERATURE
2.1 Anti –Microbial Agent Discovery
2.2 Chemical Synthesis Ushers in the Golden Age of Antibiotics Discovery :-
2.3 Early History Of Anti-Biotics Discovery and Development
2.4 The bacterial cell
2.4.1 Differences between bacterial and animal cells
2.5 Mechanism Of Anti-Bacterial Cell
2.5.1 There are four main mechanisms by which antibacterial agents act.
2.5.2 Antibacterials, 1940-Present
2.5.3 Some Anti-Bacterials Agents[27]
2.5.4 Structure-activity relationships (SAR)[28]
2.5.5 Applications of sulfonamides[29]
2.6 Mechanism of action
2.6.1 Biochemical Targets for Antifungal Chemotherapy[31]
2.6.2 Inhibition of Cell Wall Formation
2.6.3 Cell Membrane Disruption
2.6.4 Inhibition of Cell Division [32]
2.6.5 Amphotericin B
2.6.6 Mechanism of Action:
2.6.7 Adverse Effects
2.6.8 Azoles and Triazole Antifungal Agents: Ergosterol Biosynthesis Inhibitors
2.6.9 Mechanism of Action:
2.7 Azole[33,34]
2.7.1 Miconazole
2.7.2 Econazole
2.7.3 Oxiconazole
2.7.4 Sulconazole
2.7.5 Tioconazole
2.7.6 Ketoconazole
2.7.7 Itraconazole
2.7.8 Fluconazole
2.7.9 Voriconazole
2.7.10 Butoconazole
2.7.11 Terconazole
2.7.12 Posaconazole
3 PLAN OF WORK
3.1 III-A] Synthesis of Substituted 4-(1,3-benzothiazol-2-ylamino)-2H-one
3.2 III- B Synthesis of Substituted 2-[(2-oxo-2H-chromen-4-yl)oxy]-N'-[(Z)-phenylmethylidene]acetohydrazide
3.3 III- C Synthesis of 2-[(2-oxo-2H-chromen-4-yl)oxy]-N-(4-oxo-2-phenyl-1,3-thiazolidin-3- yl)acetamide
3.4 III-D] Synthesis of N-[ (2E)-4-phenyl-3,4-dihydroquinazolin- 2(1H)- ylidene ] -1,3- benzothiazol-2-amine
4 CHEMISTRY OF COUMARIN
4.1 Occurrence
4.2 Pharmacokinetics
4.2.1 Absorption and Distribution
4.2.2 Metabolism
4.2.3 Metabolism in Man
4.3 Toxicology
4.4 Applications of Coumarin and Coumarin Derivatives
4.4.1 Clinical Uses
4.4.2 High Protein Oedema (HPO)
4.4.3 Chronic Infections
4.5 Application Of Simple Coumarins In
4.5.1 Cancer Treatment
4.5.2 Coumarin in Malignant Melanoma
4.5.3 Coumarin in Renal Cell Carcinoma
4.5.4 Coumarin in Prostate Cancer
4.6 Coumarin Derivatives and Cancer
4.6.1 Furanocoumarins
4.6.2 Warfarin
4.6.3 Isoflavones
4.6.4 Genistein in Cancer Research
4.7 Chemistry of Hydrazide
4.7.1 Chemistry of Dithiocarbamate salt
4.8 Chemistry Of Quinazolines
4.8.1 Biological importance of Quinazolinones
4.8.2 Quinazolinones as anti HIV activity
4.8.3 Quinazolinones as antifungal activity
4.8.4 Quinazolinones as antioxidant activity
4.8.5 Quinazolinones as antileishmanial activity
5 CHEMISTRY OF BENZOTHIAZOLE
5.1 Benzothiazole
5.2 Characteristics of nucleus
5.3 Synthesis of 2-amino benzothiazole (Reported methods)
5.4 Method A
5.4.1 Mechanism
5.5 Method B
6 CHEMISTRY OF SCHIFF BASE
7 CHEMISTRY OF THIAZOLIDINONE
Research Objectives and Themes
The primary objective of this work is the research, synthesis, and biological evaluation of new heterocyclic molecules, focusing specifically on coumarin, benzothiazole, and quinazolinone derivatives to combat bacterial and fungal infections.
- Advancements in medicinal chemistry and drug discovery processes.
- Analysis of antimicrobial mechanisms in bacteria and fungal pathogens.
- Synthesis of novel heterocyclic derivatives with potential therapeutic applications.
- Evaluation of anti-inflammatory, antioxidant, and anticancer pharmacological activities.
Excerpt from the Book
1.1 Introduction
The primary objective of medicinal chemistry is the design and discovery of new compounds that are suitable for use as drugs. This process involves a team of workers from a wide range of disciplines such as chemistry, biology, biochemistry, pharmacology, mathematics, medicine and computing, amongst others. The discovery or design of a new drug not only requires a discovery or design process but also the synthesis of the drug, a method of administration, the development of tests and procedures to establish how it operates in the body and a safety assessment.
Drug discovery may also require fundamental research into the biological and chemical nature of the diseased state. These and other aspects of drug design and discovery require input from specialists in many other fields and so medicinal chemists need to have an outline knowledge of the relevant aspects of these fields. Drugs are strictly defined as chemical substances that are used to prevent or cure diseases in humans, animals and plants. The activity of a drug is its pharmaceutical effect on the subject, for example, analgesic or β-blocker, whereas its potency is the quantitative nature of that effect.
Summary of Chapters
1 Coumarin - A boon to Earth: Provides an overview of the history of medicine, the discovery of key drugs like penicillin, and the general stages of modern drug discovery.
2 REVIEW OF LITERATURE: Examines the development of antimicrobial agents, the biology of bacterial and fungal cells, and current insights into antifungal and antibacterial chemotherapy.
3 PLAN OF WORK: Details the research strategy, emphasizing the synthesis and characterization of specific heterocyclic compounds and the evaluation of their biological activities.
4 CHEMISTRY OF COUMARIN: Discusses the nature, pharmacokinetics, and therapeutic applications of coumarin and its derivatives, particularly in cancer and infection treatment.
5 CHEMISTRY OF BENZOTHIAZOLE: Analyzes the characteristics and various synthetic methodologies used to prepare benzothiazole derivatives.
6 CHEMISTRY OF SCHIFF BASE: Explains the structural properties of Schiff bases and the chemical mechanisms behind their formation and synthesis.
7 CHEMISTRY OF THIAZOLIDINONE: Reviews the role of thiazolidin-4-ones as important structures in medicinal chemistry and their various clinical applications.
Keywords
Medicinal Chemistry, Coumarin, Benzothiazole, Quinazolinone, Antibiotics, Antifungal, Schiff base, Thiazolidinone, Pharmacokinetics, Drug Design, Cancer Therapy, Antimicrobial, Synthesis, Bioactivity, Resistance
Frequently Asked Questions
What is the main focus of this publication?
The work focuses on the design, synthesis, and biological evaluation of new heterocyclic derivatives—specifically coumarin, benzothiazole, and quinazolinone—to treat bacterial and fungal infections.
What are the core research themes?
The central themes include the history of drug discovery, mechanisms of antimicrobial action, synthetic strategies for heterocycles, and their pharmacological potential in anti-inflammatory and anticancer therapies.
What is the primary objective or research question?
The objective is to synthesize and characterize safer, more effective molecules to address issues like drug resistance and the suboptimal profiles of existing chemotherapeutic agents.
Which scientific methodologies are employed?
The study utilizes chemical synthesis pathways, structural analysis, and biological screening assays to evaluate anti-inflammatory, antioxidant, and anti-microbial activities.
What topics are covered in the main body?
The main body covers the chemistry and literature of coumarins, hydrazides, quinazolines, and Schiff bases, alongside detailed synthetic plans and pharmacological assessments.
Which keywords characterize this work?
Key terms include Medicinal Chemistry, Coumarin, Benzothiazole, Antibiotics, Schiff base, and drug resistance.
How do bacteria and fungi differ in their susceptibility to drugs?
Unlike animal cells, bacterial cells possess unique cell walls, and fungal cells share many biochemical targets with eukaryotic cells, thus requiring specific agents like azoles or polyenes for selective toxicity.
What is the clinical significance of coumarin according to the text?
Coumarin and its derivatives are highlighted for their potential antitumor properties, use in high protein oedema (HPO), and their ability to act as scaffolds for new therapeutic agents.
What is the significance of Schiff bases in this study?
Schiff bases are explored for their role in binding metallic centers and their documented antifungal and antibacterial activities, serving as a functional group in the molecules being synthesized.
Why is the synthesis of Quinazolinones important?
Quinazolinones are significant due to their diverse biological properties, including anticancer, anticonvulsant, and anti-leishmanial activity, making them promising targets for drug development.
- Quote paper
- Dr Neha Mishra (Author), Dr Pritesh Sharma (Author), 2023, Coumarin as a Boon to Earth. A new Cancer Treatment?, Munich, GRIN Verlag, https://www.hausarbeiten.de/document/1321483
