A) Williamsons synthesis
B) Hoffmanns reaction
C) Mendius reaction
D) Darzens process
Correct Answer: D
Solution :
The reaction of straight chain primary alcohols with thionyl chloride to form chlorobenzene is called Darzens reaction. \[ROH+SOC{{l}_{2}}\xrightarrow{Pyridine}RCl+S{{O}_{2}}+HCl\] Hoffmanns-Bromamide reaction: \[\underset{Amide}{\mathop{RCON{{H}_{2}}}}\,+B{{r}_{2}}+4KOH\xrightarrow{{}}\underset{p-\text{amine}}{\mathop{RN{{H}_{2}}}}\,+{{K}_{2}}C{{O}_{3}}\] \[+2KBr+2{{H}_{2}}O\] Mendius reaction: \[\underset{\begin{smallmatrix} (Alkyl\,or \\ aryl\,cyanide) \end{smallmatrix}}{\mathop{RCN}}\,+4[H]\xrightarrow{Na/{{C}_{2}}{{H}_{5}}OH}\underset{A\operatorname{mine}}{\mathop{RC{{H}_{2}}}}\,N{{H}_{2}}\] Williamson synthesis: \[\underset{\begin{smallmatrix} Alkyl \\ halide \end{smallmatrix}}{\mathop{RX}}\,+\underset{\begin{smallmatrix} Sodium \\ alkoxide \\ or\,phenoxide \end{smallmatrix}}{\mathop{RONa}}\,\xrightarrow{{}}\underset{Ether}{\mathop{ROR}}\,+NaX\]
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