B.Pharmacy 4th Semester Pharmaceutical Organic Chemistry-III Notes

B.Pharmacy 4th Semester Pharmaceutical Organic Chemistry–III notes cover heterocyclic compounds, aromatic chemistry, and medicinal intermediates. The syllabus includes nomenclature, synthesis, reactions, stereochemistry, and pharmaceutical applications of key heterocycles such as pyridine, quinoline, indole, imidazole, and benzodiazepines. These notes provide pharmacy students with a strong foundation in organic chemistry concepts relevant to drug design, development, and structure–activity relationships.

Bachelor of Pharmacy
Semester		4th Semester		Subject		Pharmaceutical Organic Chemistry–III
Syllabus
Unit 1st	Stereoisomerism Optical isomerism Optical activity, enantiomerism, diastereoisomerism, meso compounds Elements of symmetry, chiral and achiral molecules DL system of nomenclature of optical isomers, sequence rules, RS system of nomenclature of optical isomers Reactions of chiral molecules Racemic modification and resolution of racemic mixture. Asymmetric synthesis: partial and absolute
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Unit 2nd	Geometrical isomerism Nomenclature of geometrical isomers (Cis Trans, EZ, Syn Anti systems) Methods of determination of configuration of geometrical isomers. Conformational isomerism in Ethane, n-Butane and Cyclohexane. Stereo isomerism in biphenyl compounds (Atropisomerism) and conditions for optical activity. Stereospecific and stereoselective reactions
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Unit 3rd	Heterocyclic compounds: Nomenclature and classification Synthesis, reactions and medicinal uses of following compounds/derivatives Pyrrole, Furan, and Thiophene Relative aromaticity and reactivity of Pyrrole, Furan and Thiophene
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Unit 4th	Synthesis, reactions and medicinal uses of following compounds/derivatives Pyrazole, Imidazole, Oxazole and Thiazole. Pyridine, Quinoline, Isoquinoline, Acridine and Indole. Basicity of pyridine Synthesis and medicinal uses of Pyrimidine, Purine, azepines and their derivatives
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Unit 5th	Reactions of synthetic importance Metal hydride reduction (NaBH4 and LiAlH4), Clemmensen reduction, Birch reduction, Wolff Kishner reduction. Oppenauer-oxidation and Dakin reaction. Beckmanns rearrangement and Schmidt rearrangement. Claisen-Schmidt condensation
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Pharmaceutical Organic Chemistry–III focuses on heterocyclic compounds, aromatic chemistry, and important medicinal intermediates. The subject covers nomenclature, synthesis, reactions, and pharmaceutical applications of heterocycles such as pyridine, quinoline, indole, imidazole, and benzodiazepines. It also includes concepts of stereochemistry, spectroscopy basics, and structure–activity relevance, helping students understand the organic chemistry behind drug development and synthesis.

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