Question

$C{H}_3-\stackrel{C{H}_3}{\stackrel{|}{C}H}-\stackrel{OH}{\stackrel{|}{C}H}-C{H}_2-COOH$
The IUPAC name of the above compound is:

• A. 3-hydroxy–4–methylpentaonic acid
• B. 4–methyl–3–hydroxypentanoic acid
• C. 2–methyl–3–hydroxylpentan-5-oic acid
• D. 4,4–dimethyl–3–hydroxybutanoic acid

Answer 1

The correct option is A 3-hydroxy–4–methylpentaonic acid

Here, carboxylic acid is the principal functional group. The numbering starts from here. Naming of substituents takes place in an alphabatical manner.