question_answer

Above reaction is known as:

A)  Streckers reaction

B)  Sandmeyers reaction

C)  Wolff-Kishner reaction

D)  Stephens reaction

Correct Answer: B

Solution :

The reaction is as Sandmeyer reaction. Streckers reaction: \[\underset{Ethanol}{\mathop{C{{H}_{3}}CHO}}\,\xrightarrow[-{{H}_{2}}O]{NaCN/N{{H}_{4}}Cl}\underset{\begin{smallmatrix}  | \\  N{{H}_{2}}  \\  2-a\min o\,propane\,nitrile \end{smallmatrix}}{\mathop{C{{H}_{3}}-C{{H}_{2}}-C\equiv N}}\,\] \[\overset{N{{H}_{2}}}{\mathop{\overset{|}{\mathop{\underset{\alpha -alanine}{\mathop{\xrightarrow{{{H}_{3}}{{O}^{+}}}C{{H}_{3}}-CH-COOH+NH_{4}^{+}}}\,}}\,}}\,\] Wolff Kishner reaction (Reduction): Stephens reduction reaction \[\underset{\begin{smallmatrix}  Alkyl \\  cyanide \end{smallmatrix}}{\mathop{RCN}}\,\xrightarrow[\begin{smallmatrix}  (H) \\  \operatorname{Re}duction \end{smallmatrix}]{SnC{{l}_{2}}/HCl}\underset{Aldehyde}{\mathop{RCHO}}\,+N{{H}_{3}}\]