Question

Correct IUPAC name of the following compound is

• A. 3-Formyl-5-hydroxyaniline
• B. 3-Amino-5-hydroxybenzaldehyde
• C. 5-Amino-3-formyl phenol
• D. None of the above

Answer 1

The correct option is B

3-Amino-5-hydroxybenzaldehyde

Let's look at the structure.

We have a benzene ring here with three different functional groups attached to it.

According to priority,

$CHO>OH>N{H}_2$

Now,

If different groups are attached to the benzene ring, then the following rules are kept in mind,

(a) The principal group is fixed as umber 1.

(b) The numbering of the chain is done in any direction (clockwise or anticlockwise) which gives lower number to the substituent.

(c) The substituents are written in alphabetical order.

Now,

Primary suffix $\to$ Benzene

Secondary suffix $\to$ owaldehyde

Now, our principal group is $CHO$.

Now,

Give numbering

Therefore,

3-Amino-5-hydroxybenzaldehyde