The most appropriate reagent for conversion of

Question:

The most appropriate reagent for conversion of $\mathrm{C}_{2} \mathrm{H}_{5} \mathrm{CN}$ into $\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{NH}_{2}$ is :

  1. $\mathrm{Na}(\mathrm{CN}) \mathrm{BH}_{3}$

  2. $\mathrm{LiAlH}_{4}$

  3. $\mathrm{NaBH}_{4}$

  4. $\mathrm{CaH}_{2}$


Correct Option: , 2

Solution:

$\mathrm{CH}_{3}-\mathrm{CH}_{2}-\mathrm{C} \equiv \mathrm{N} \stackrel{?}{\longrightarrow} \mathrm{CH}_{3}-\mathrm{CH}_{2}-\mathrm{CH}_{2}-\mathrm{NH}_{2}$

$\mathrm{CH}_{3}-\mathrm{CH}_{2}-\mathrm{C} \equiv \mathrm{N} \stackrel{\mathrm{Li} \mathrm{AlH}_{4}}{\longrightarrow} \mathrm{CH}_{3}-\mathrm{CH}_{2}-\mathrm{CH}_{2}-\mathrm{NH}_{2}$

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