About Medicinal Chemistry I
Subject Code
BP402T
Semester
Semester 4
Credits
4 Credits
Medicinal Chemistry I (BP402T) connects chemical structure to pharmacological activity. It covers the physicochemical properties affecting drug action, drug metabolism, and the detailed study of drugs acting on the Autonomic and Central Nervous Systems, including their structure-activity relationships (SAR) and synthesis.
Key Learning Objectives
- Understand Drug Action: Learn how physicochemical properties influence biological action.
- Study Drug Metabolism: Grasp the principles of Phase I and Phase II metabolic pathways.
- Master SAR: Understand the Structure-Activity Relationships for various classes of drugs.
- Learn Synthesis: Memorize the synthesis of specific medicinal compounds marked with an asterisk (*).
Syllabus & Topics Covered
Unit 1: Introduction to Medicinal Chemistry & Drug Metabolism
- History and development of medicinal chemistry
- Physicochemical properties in relation to biological action (Ionization, Partition Coefficient, etc.)
- Drug metabolism principles – Phase I and Phase II pathways
- Factors affecting drug metabolism including stereochemical aspects
Unit 2: Drugs acting on Autonomic Nervous System
- Adrenergic Neurotransmitters: Biosynthesis and catabolism
- Sympathomimetic agents (Direct, Indirect, Mixed mechanism) and their SAR
- Adrenergic Antagonists (Alpha and Beta blockers) and their SAR
Unit 3: Cholinergic and Solanaceous Alkaloids
- Cholinergic neurotransmitters: Biosynthesis and catabolism
- Parasympathomimetic agents and Cholinesterase inhibitors
- Cholinergic Blocking agents: SAR and analogues
- Synthetic cholinergic blocking agents
Unit 4: Drugs acting on Central Nervous System (Part I)
- Sedatives and Hypnotics: Benzodiazepines and Barbiturates (SAR and examples)
- Antipsychotics: Phenothiazines (SAR) and related compounds
- Anticonvulsants: SAR, Barbiturates, Hydantoins, and other classes
Unit 5: Drugs acting on Central Nervous System (Part II)
- General anesthetics: Inhalation, ultra-short acting, and dissociative
- Narcotic and non-narcotic analgesics: Morphine analogues and SAR
- Anti-inflammatory agents: NSAIDs, Aspirin, Ibuprofen, Diclofenac
- Synthesis of marked compounds like Fentanyl, Methadone, Ibuprofen
How to Score High in Medicinal Chemistry I
- 1
Focus on the Asterisk (*): The syllabus marks certain drugs with an asterisk. You MUST know their chemical synthesis.
- 2
Master SAR: Don’t memorize every structure blindly. Learn the base core and how substitutions affect activity.
- 3
Link with Pharmacology: Study Medicinal Chemistry and Pharmacology concurrently for overlapping topics.
- 4
Draw Daily: Practice drawing chemical structures and synthetic pathways every day.
Why it Matters for Career
Medicinal chemistry is the core of pharmaceutical research and development. It provides the skills to design, develop, and synthesize new therapeutic agents, which is crucial for roles in drug discovery and formulation.
Exam Weightage
Synthesis pathways of asterisk-marked drugs and Structure-Activity Relationships (SAR) of major drug classes (like Phenothiazines or Barbiturates) are the highest yielding topics for exams.
Frequently Asked Questions (FAQs)
Is Medicinal Chemistry difficult to pass?
It requires consistent practice. Grouping drugs by their chemical class and focusing on SAR makes it much more manageable.
Do I need to memorize all drug structures?
No, focus on the base structure of the class, the general SAR, and the complete structures of important prototype drugs and those marked for synthesis.
How should I study drug metabolism?
Focus on the distinct chemical transformations in Phase I (oxidation, reduction, hydrolysis) and Phase II (conjugation) rather than memorizing every specific drug’s exact metabolic fate.