pls solve and give explanation 

Identify the site where electrophilic aromatic substitution takes place

a)1 and 2
b)2 and 3
c)a and c
d)b
 

1. Electrophilic substitution will take place on position 3 in major amount and on position 1 in very minor amount.

2. This is because, the lone pair on N of primary amine operate a +R effect and thus, electrophilic substitution at p- position to it is very much favoured.

3. But the oxygen attached does not give a full +R effect as its lone pairs undergo cross-conjugation and less available for aromatic system. The cross conjugation is as shown:

  

  • 3
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