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. \[\underset{H\,\,OH}{\mathop{\underset{||}{\mathop{\overset{||}{\mathop{-C-C}}\,-}}\,}}\,\xrightarrow{RONa/\,C{{S}_{2}}}\underset{H\underset{S}{\mathop{\underset{||}{\mathop{O-C-SMe}}\,}}\,}{\mathop{\underset{||}{\mathop{\overset{||}{\mathop{-C-C}}\,-}}\,}}\,\]\[\xrightarrow[\begin{smallmatrix} Chugaev \\ reaction \end{smallmatrix}]{100-{{250}^{o}}C}\overset{||}{\mathop{-C=C-}}\,+COS+MeSH\]
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