MCQ
Consider the given reaction, percentage yield of :
  • A
    $C > A > B$
  • B
    $B > C > A$
  • C
    $A > C > B$
  • $C > B > A$

Answer

Correct option: D.
$C > B > A$
d

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An amino acid may be represented by general formula $\begin{matrix}
   R\,\,\,\,\,\,\,\,  \\
   |\,\,\,\,\,\,\,\,  \\
   {{H}_{2}}N-CH-COOH  \\
\end{matrix}$ If $R = -CH_2C_6H_5$ then it is phenylalanine $(Phe)$ and if $R = CH_3$ then it is alanine $(Ala)$. Find the sequence of reagents from those given below to synthesize $Phe- Ala$

$(1)$ $\begin{matrix}
   C{{H}_{3}}  \\
   |\,\,\,\,\,\,  \\
   ZNH\,C\,HC{{O}_{2}}H  \\
\end{matrix}$                             $(2)$ $\begin{matrix}
   C{{H}_{3}}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,  \\
   |\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,  \\
   {{H}_{2}}N\,C\,HC{{O}_{2}}C{{H}_{2}}{{C}_{6}}{{H}_{5}}  \\
\end{matrix}$

$(3)$ $\begin{matrix}
   \,\,\,\,\,\,\,\,\,\,\,\,C{{H}_{3}}{{C}_{6}}{{H}_{5}}  \\
   |\,\,\,\,\,  \\
   ZNH\,C\,HC{{O}_{2}}H  \\
\end{matrix}$                $(4)$ $\begin{matrix}
   C{{H}_{2}}{{C}_{6}}{{H}_{5}}\,\,\,\,\,  \\
   |\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,  \\
   {{H}_{2}}N\,CHC{{O}_{2}}C{{H}_{2}}{{C}_{6}}{{H}_{5}}  \\
\end{matrix}$

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