Question

What happen when 1,4 dicarbonyl compound treated with
ammonia or ammonium carbonate?
Pyrolle
Pyridine
Furan
Furan​

Answer 1

Answer:

The correct option is Pyrolle.

Explanation:

• In the Paal-Knorr Pyrrole Synthesis, a 1,4-dicarbonyl molecule is condensed with too much of a primary amine or ammonia to yield a pyrrole.
• Both neutral and mildly acidic conditions are acceptable for the reaction.
• Although the use of amine/ammonium hydrochloride salts or reactions at PH 3 results in furans as the major products, adding a weak acid, such as acetic acid, speeds up the process.
• Any organic molecule in the heterocyclic series with a ring structure made up of four carbon atoms and one nitrogen atom is called a pyrrole. The molecule with the molecular formula $C_{4} H_{5} N$ pyrrole is the most basic member of the pyrrole family.

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