JEE MAIN - Chemistry (2022 - 25th June Evening Shift - No. 15)

Which of the following ketone will NOT give enamine on treatment with secondary amines? [where t-Bu is $$-$$C(CH3)3]
JEE Main 2022 (Online) 25th June Evening Shift Chemistry - Compounds Containing Nitrogen Question 92 English Option 1
JEE Main 2022 (Online) 25th June Evening Shift Chemistry - Compounds Containing Nitrogen Question 92 English Option 2
JEE Main 2022 (Online) 25th June Evening Shift Chemistry - Compounds Containing Nitrogen Question 92 English Option 3
JEE Main 2022 (Online) 25th June Evening Shift Chemistry - Compounds Containing Nitrogen Question 92 English Option 4

Explanation

In order to form enamine from the reaction of carbonyl compound with $2^{\circ}$ amine, the carbonyl compound must have $\alpha$-hydrogen.

JEE Main 2022 (Online) 25th June Evening Shift Chemistry - Compounds Containing Nitrogen Question 92 English Explanation
Along with this, due to steric crowding by t-Bu group, it is difficult for $2^{\circ}$ amine to attack on this compound.

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