ER20 11T

Indian institute Of science and technology

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SYNTHESIS OF CINNAMIC ACID FROM BENZALDEHYDE
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5

mei 2025

2024/2025
Cinnamic acid is synthesized from benzaldehyde using the Perkin reaction, which involves the condensation of an aromatic aldehyde (benzaldehyde) with an acid anhydride (usually acetic anhydride) in the presence of a basic salt of the acid (typically sodium acetate). This reaction forms an α,β-unsaturated carboxylic acid, namely cinnamic acid. Preparation Steps: Mix benzaldehyde, acetic anhydride, and sodium acetate in a round-bottom flask. Heat the mixture under reflux for 1–2 hours...
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PREPARTION OF SALICYLIC ACID FROM METHYL SALICYLATE
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5

mei 2025

2024/2025
Title: Human Anatomy and Physiology – Comprehensive Textbook for Medical and Health Sciences Students (Latest Edition) – Full Chapter Summaries and Key Concepts Description: This document provides a detailed overview of all major systems in the human body, including the skeletal, muscular, nervous, cardiovascular, respiratory, digestive, urinary, and reproductive systems. Each chapter summary includes definitions, diagrams, and key physiological processes explained clearly. Ideal for stu...
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Pharmaceuticals organic Chemistry salt analysis
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17

mei 2025

2024/2025
Salt analysis in Pharmaceutical Organic Chemistry focuses on identifying organic salts and compounds through functional group analysis, solubility behavior, and derivative preparation. Unlike classical inorganic salt analysis, POC salt analysis aims to characterize pharmaceutical compounds—such as amines, carboxylic acids, and their salts—using systematic preliminary and confirmatory tests. The process often includes detecting the presence of acidic or basic organic groups and matching them ...
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PREPARTION OF PHENYL BENZOATE FROM PHENOL
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4

mei 2025

2024/2025
Phenyl benzoate is prepared by reacting phenol with benzoyl chloride in the presence of aqueous sodium hydroxide, a process known as the Schotten-Baumann reaction. This is an example of ester formation where the hydroxyl group of phenol reacts with the acid chloride group of benzoyl chloride, forming the ester phenyl benzoate and releasing hydrochloric acid, which is neutralized by the base. Preparation Steps: Dissolve phenol in aqueous sodium hydroxide to form the phenoxide ion. Slowly...
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PREPARTION OF ACETANILIDE FROM ANILINE
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5

mei 2025

2024/2025
Title: Human Anatomy and Physiology – Comprehensive Textbook for Medical and Health Sciences Students (Latest Edition) – Full Chapter Summaries and Key Concepts Description: This document provides a detailed overview of all major systems in the human body, including the skeletal, muscular, nervous, cardiovascular, respiratory, digestive, urinary, and reproductive systems. Each chapter summary includes definitions, diagrams, and key physiological processes explained clearly. Ideal for stu...
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PREPARTION OF BENZOIC ACID FROM BENZAMIDE
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4

mei 2025

2024/2025
The preparation of benzoic acid from benzamide involves acidic or basic hydrolysis of the amide group. In this process, benzamide is heated with dilute hydrochloric acid or sodium hydroxide solution, leading to the cleavage of the amide bond and formation of benzoic acid and ammonia (or its salt). The product is then acidified and crystallized. Preparation Steps (Using Alkaline Hydrolysis): Dissolve benzamide in aqueous sodium hydroxide solution. Heat the mixture under reflux for 1–2 ...
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PREPARTION OF ACETYL SALICYLIC ACID
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6

mei 2025

2024/2025
Acetylsalicylic acid, commonly known as aspirin, is prepared through the esterification of salicylic acid with acetic anhydride in the presence of a catalyst, usually concentrated sulfuric acid or phosphoric acid. This reaction replaces the hydroxyl group on salicylic acid with an acetyl group, forming the ester acetylsalicylic acid. Preparation Steps: Mix salicylic acid with acetic anhydride in a dry flask. Add a few drops of concentrated sulfuric acid as a catalyst. Heat the mixtur...
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PREPARTION OF 5 - NITRO SALICYLIC ACID FROM SALICYLIC
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5

mei 2025

2024/2025
The preparation of 5-nitrosalicylic acid involves the electrophilic nitration of salicylic acid using a nitrating mixture, typically composed of concentrated nitric acid (HNO₃) and sulfuric acid (H₂SO₄). The nitro group preferentially substitutes at the 5-position on the aromatic ring due to the directing effects of the hydroxyl and carboxylic acid groups present on salicylic acid. Preparation Steps: Dissolve salicylic acid in concentrated sulfuric acid under cooling conditions. S...
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Preparation Method and process
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5

mei 2025

2024/2025
The preparation of benzanilide involves the reaction of aniline with benzoyl chloride in an alkaline medium, typically using sodium hydroxide (NaOH). This method is based on a nucleophilic acyl substitution reaction where the amine group of aniline attacks the carbonyl carbon of benzoyl chloride, resulting in the formation of benzanilide. Preparation Steps: Dissolve aniline in a solution of sodium hydroxide to form the anilinium ion. Cool the solution in an ice bath to control temperatu...
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PREPARTION OF BENZANILIDE FROM ANILINE
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4

mei 2025

2024/2025
The preparation of benzanilide from aniline is an example of an acylation reaction, specifically a nucleophilic substitution where aniline reacts with benzoyl chloride in the presence of a base such as sodium hydroxide. The reaction occurs under alkaline conditions to neutralize the hydrochloric acid formed during the process. This experiment demonstrates the formation of an amide from a primary amine and an acid chloride. Reaction overview: Aniline + Benzoyl chloride → Benzanilide + HCl...
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