Question

Benzaldehyde is treated with malonic ester in presence of piperidine followed by base hydrolysis gives ___? a) Acrylic Acid b)Crotonic Acid c)Cinnamic Acid d)Acetic Acid​

Answer 1

• Ans: b) crotonic acid is the answer for this question

Answer 2

Benzaldehyde is treated with malonic ester in presence of piperidine followed by base hydrolysis gives Cinnamic Acid. (option c)

• Malonic acid when treated with benzaldehyde there is a loss of water. So the ester present undergoes hydrolysis to give Cinnamic acid.
• Cinnamic acid is used mainly in pharmaceutical industries, manufacture of dyes and additives, flavors.
• The IUPAC name of Cinnamic acid is called (E)-3-phenyl prop-2-eonic acid.
• Commonly cinnamic acid is found in cinnamon which is used as a spice ingredient in foods.