Biginelli Reaction

The video tutorial covers the Biginelli reaction, a multicomponent reaction involving an aromatic aldehyde, urea, and a beta keto ester to produce dihydropyrimidinone. It discusses the reaction's history, mechanism, and its significance in creating chemical libraries for biological screening. The tutorial also explores the structure and nomenclature of pyrimidines, the reaction's mechanism, and the development of enantioselective versions using chiral acids. The Biginelli reaction's applications in modern organic synthesis are highlighted, demonstrating its enduring relevance.

Who discovered the Biginelli reaction and in which year?

• Marie Curie in 1911

• Isaac Newton in 1687

• Albert Einstein in 1905

• Pietro Biginelli in 1891

What is the main product of the Biginelli reaction?

• Dihydropyrimidinone

• Benzene

• Methane

• Ethanol

In the Biginelli reaction product, which positions are hydrogen atoms added to?

• Positions 1 and 2

• Positions 3 and 4

• Positions 7 and 8

• Positions 5 and 6

What is the first step in the proposed mechanism of the Biginelli reaction?

• Formation of a hemiaminal

• Formation of a carbocation

• Formation of a radical

• Formation of a ketone

Which intermediate is formed during the Biginelli reaction mechanism?

• Radical

• Carbocation

• Ketone

• Carbomoil iminium ion

What type of catalyst did Professor Liu Xu Gong use in his research on the Biginelli reaction?

• Nitric acid

• Chiral phosphoric acid

• Sulfuric acid

• Hydrochloric acid

What is the enantiomeric excess achieved by Professor Liu Xu Gong in his study of the Biginelli reaction?

• 75%

• 50%

• 97%

• 100%