B. pharm. benzaldehyde and acetophenone

Introduction, preparation and uses

1. ONLINE CLASS Purvanchal University Presenter: Mr. Yograj Podar

2. BENZALDEHYDE [ Preparation and uses ] Benzaldehyde  (C 6 H 5 CHO) is an  organic compound  consisting of a  benzene  ring with a  formyl  substituent. It is the simplest  aromatic   aldehyde  and one of the most industrially useful It is a colorless liquid with a characteristic almond-like odor. The primary component of bitter almond oil, benzaldehyde can be extracted from a number of other natural sources. Synthetic benzaldehyde is the flavoring agent in imitation almond extract, which is used to flavor cakes and other baked goods.

3. BACKGROUNDS: Benzaldehyde was first extracted in 1803 by the French pharmacist Martrès from the bitter almonds , the fruit of  Prunus dulcis . [7 In 1832,  Friedrich Wöhler  and  Justus von Liebig   first synthesized benzaldehyde. [9] Liquid phase  chlorination  and  oxidation  of  toluene  are the main routes. Numerous other methods have been developed, such as the partial oxidation of  benzyl alcohol ,  alkali  hydrolysis of  benzal chloride , and the  carbonylation  of benzene. Most of the benzaldehyde that people eat is from natural plant foods, such as  almonds . [14]

4. Preparation of Benzaldehyde: PREPARATION OF BENZALDEHYDE

5. MECHANISM CS 2 CS 2

6. USES

7. Fig. 2: Ephedrine from Benzaldehyde Fig. 1: Chloramphenicol from Benzaldehyde

8. ACETOPHENONE [ Preparation and uses ]

9. Preparation of acetophenone

10. Thank You USES of acetophenone