Question

#104 of Organic Reaction Types Consider the following reaction by looking carefully at the changes in structure between reactant and product. What type of reaction is this reaction? OH 2-oxopropanoic acid (also called pyruvic acid or a-ketopropionic acid) 2-hydroxypropanoic acid (lactic acid) Select one: a. Oxidation O b. Substitution c. Elimination O d. Addition e. Reduction

Answer 1

Solution

e. Reduction​​​

This is reduction reaction.

Reduction defines as

---> Addition of electron

---> Addition of hydrogen to multiple bonds i.e. carbon carbon double and triple bond, carbon nitrogen triple bond, carbon oxygen double bond (carbonyl group)

---> Removal of oxygen

When pyrubic acid undergo reduction of keto group (addition of hydrogen) at $\alpha$ -position then it will yields lactic acid.