Question

12. Predict the major product for the following reaction. CH3 Fuming H2SO4 ÖCH3

Answer 1

null

It is electrophilic substitution reaction

Methyl and methoxy both are electron donating groups or activating group

Methoxy group are strongly electron donating groups compered with methyl

Therefor Methoxy group is deciding incoming electrophile.

1-methoxy-4-methylbenzene reaction with fuming H2So4 to give 2-methoxy-5-methylbenzene-1-sulfonic acid as major product due to methoxy group are o,p directing , para position is already blocked with methyl group . therefor sulfonation take place at ortho position.