JEE Main 2021 · ChemistryMultiple choiceDiagram basedMediumMulti-step

JEE Main 4 August 2021, Shift 2, Chemistry Q47

Question 47 of 90 in this shift, Chemistry question 17 of 30, Section A.

The major products A and B in the following reaction sequence are [reaction scheme: see figure_note] (Ph = -

\mathrm{C_6H_5}

)

The figure, in words

Reactant drawn: benzene ring (circle inside) with a CH2-CN side chain, plus H5C6MgBr; arrow labelled 'dry ether, H3O+' to A; arrow with 'LiAlH4' above and 'H3O+' below to B. Options are drawn skeletal structures: a ring (circle inside) bonded to a vertex then to a carbon bearing the substituents shown in the options (NH single-bond line in option 3 A; two Ph bonds in option 3 B).

(1)A = [ring(circle)-CH2-C(=NH)Ph], B = [ring(circle)-CH2-CH(NH2)Ph]
(2)A = [ring(circle)-CH2-C(=O)Ph], B = [ring(circle)-CH2-CH(OH)Ph]Official answer
(3)A = [ring(circle)-CH2-C(NH)(Ph)(Ph)], B = [ring(circle)-CH2-CH(Ph)(Ph)]
(4)A = [ring(circle)-CH2-C(=NMgBr)Ph], B = [ring(circle)-CH2-CH(NH2)Ph]

Official answer

Option 2

NTA final key.

Chapter: Amines
Topic: No close match in our taxonomy
Idea tested: No close match in our taxonomy