A) Chugaev reaction
B) Dakin reaction
C) Reimer-Tiemann reaction
D) Wurtz-Fittig reaction
Correct Answer: A
Solution :
Dehydration of primary alcohols with alkoxide and\[C{{S}_{2}}\]to give terminal alkenes is called chugaev elimination. During this reaction xanthate is formed as intermediate which finally on pyrolysis gives olefin, COS and the thiol. \[-\underset{\begin{smallmatrix} | \\ H \end{smallmatrix}}{\overset{|}{\mathop{C}}}\,-\underset{\begin{smallmatrix} | \\ OH \end{smallmatrix}}{\overset{|}{\mathop{C}}}\,\xrightarrow{RONa/C{{S}_{2}}}-\underset{\begin{smallmatrix} | \\ H \end{smallmatrix}}{\overset{|}{\mathop{C}}}\,-\underset{\begin{smallmatrix} | \\ O \end{smallmatrix}}{\overset{|}{\mathop{C}}}\,\underset{\begin{smallmatrix} \\ \\ - \end{smallmatrix}}{\mathop{-}}\,\underset{\begin{smallmatrix} \\ \underset{\begin{smallmatrix} || \\ S \end{smallmatrix}}{\mathop{C}}\,-SMe \end{smallmatrix}}{\mathop{{}}}\,\] \[\xrightarrow[\begin{smallmatrix} Chugaev \\ reaction \end{smallmatrix}]{100-{{250}^{o}}C}-\overset{|}{\mathop{C}}\,=\overset{|}{\mathop{C}}\,-+COS+MeSH\]
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