How do you synthesis benzocaine?
How do you synthesis benzocaine?
A three-step synthesis is used to create benzocaine. First p- aminobenzoic acid is produced from taking p-acetotoluidide and oxidizing it with magnesium sulfate. Then to create an amino acid, p-aminobenzoic acid is then heated with hydrochloric acid.
How do you purify benzocaine further?
Purifying the Benzocaine. a) Add a few mL of hot ethanol and heat the mixture on the steam bath until all the oil dissolves. b) Add water (drop wise!) to the alcohol solution until cloudiness just appears and then add a few drops of ethanol. Cool the mixture, with occasional VIGOROUS swirling, in an ice bath.
Which reaction is involved in the synthesis of benzocaine?
Benzocaine is the derivative of p-aminobenzoic acid and can be synthesized via the Fischer esterification reaction. It can be prepared from p-toluidine by a four-step synthesis. The problem of a synthesis of this type is that the overall yield of the final product is usually quite low.
Is benzocaine a drug?
Although benzocaine and lidocaine are legal substances, it is illegal to supply these chemicals to the underground drugs trade. The drugs are used legitimately in the UK as a dental anaesthetic and as an ingredient in first aid ointments, throat sprays and sunburn remedies.
How is benzocaine prepared as a local anesthetic?
1.1 Method [4] I synthesized a local anesthetic called Benzocaine (Fig. 1 on page i). Benzocaine was prepared in this experiment by the direct esterification of p– Aminobenzoic acid with absolute ethanol. See the following chart (Fig. 2) for the reaction.
Why is benzocaine produced in a REAC-tion reaction?
Like the direct esterification reaction to produce artificial flavors, this reac- tion gives a lower yield of Benzocaine due to chemical equilibrium. But by Le Chatelier’s principle, the equilibrium of the reaction is shifted to yield additional product. Due to this principle the balance is on the side of the lower force, and
Can a benzocaine be extracted from sodium bisulfate?
Under these conditions, much of the nonionic benzocaine formed in the experiment should remain dis- solved, and some ionic sodium bisulfate and unreacted sodium p–aminobenzoate may precipitate. Extraction of ths mixture with ether permits the separation of the benzocaine from the ionic compounds.