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CH3CH2Cl → NaCN → X → Ni/H2 → Y → Acetic anhydride → Z. Z in the above reaction sequence is:

1. CH3CH2CH2NHCOCH3
2. CH3CH2CH2NH2
3. CH3CH2CH2CONHCH3
4. CH3CH2CH2CONHCOCH3

Correct answer: CH3CH2CH2NHCOCH3

Solution

The reaction sequence involves substitution of -Cl with -CN, reduction of -CN to -CH2NH2, and acetylation of the resulting amine. This leads to CH3CH2CH2NHCOCH3 as the final product.

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