Introduction, preparation and uses

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

2. BENZALDEHYDE
[Preparation and uses]
 Benzaldehyde (C6H5CHO) 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.

4.  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]

6. Preparation of Benzaldehyde:
PREPARATION OF
BENZALDEHYDE

7. MECHANISM
CS2
CS2

8. USES

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

10. ACETOPHENONE
[Preparation and uses]

11. Preparation of acetophenone

12. Thank
You
USES of acetophenone