Question

$RCH _{2} CH _{2} OH \xrightarrow{?}RCH _{2} CH _{2} CH _{2} NH _{2}$
Identify the sequence of the reagents in order to carry out the above conversion.

• A. (i) $PBr _{3}$ (ii) $KCN$ (iii) $LiAIH _{4}$
• B. (i) $PBr _{3}$ (ii) $KCN$ (iii) $H _{2}$
• C. (i) $HCN$ (ii) $PHr _{3}$ (iii) $LiAIH _{4}$
• D. (i) $HCN$ (ii) $LiAIH _{4}$

Answer 1

Answer: (A)

$RCH _{2} CH _{2} OH + PBr _{3} \longrightarrow RCH _{2} CH _{2} Br \xrightarrow{ KCN }{ }$
$RCH _{2} CH _{2} CH _{2} NH _{2} \xleftarrow{ LiAlH _{4}} RCH _{2} CH _{2} CN$