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:
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: