Q8 · CSIR-NET Chemistry, June 2014
Paper: CSIR-NET June 2014 · Subject: Organic Chemistry · Chapter: Reagents, Reaction Mechanisms & Named Reactions · Topic: Reagents, Reaction Mechanisms & Named Reactions – General · Marks: 2 · Difficulty: Medium
The products A and B in the following reaction sequence are: 
B
B(a)
B 
B (b)
B = 
B = (c)
B = 
B = (d)
Answer
Answer: A ✓ checked by 4AB · confidence high
Explanation
Hydrazine removes the phthalimide (Ing–Manske) to give the free primary amine A; heating cyclises the amine onto the methyl ester to the γ-lactam (a).
Study loop for Reagents, Reaction Mechanisms & Named Reactions