Question

Write the IUPAC name of the following compound.

Options

• 2-Amino-4-hydroxybenzoic acid

• 6-Amino-4-hydroxybenzoic acid

• 3-Amino-4-carboxyphenol

• 2-Carboxy-5-hydroxyaniline

Answer 1

2-Amino-4-hydroxybenzoic acid

Explanation:

Priority is given to the \[\ce{-COOH}\] group over the \[\ce{NH2}\] and [\ce{OH}\] groups. So, position 1 is thought to be occupied by the carbon atom containing the \[\ce{-COOH}\]  group. The ring's carbon atoms are numbered to give the substituents the lowest locant.

The given compound's IUPAC name is 2-amino-4-hydroxybenzoic acid.