Question

Write the structure of A, B, and C in the following sequence of reactions:

\[\ce{CH3CN->[{1.} (DIBAL-H)][{2.} H2O] A ->[Dil{.} NaOH][] B ->[Δ][] C}\]

Answer 1

\[\begin{array}{cc}\\
\ce{O\phantom{.........................................................}}\\
||\phantom{.........................................................}\\
\ce{CH3CN->[{1.} (DIBAL-H)][{2.} H2O] \underset{(A)}{CH3 - C - H} ->[Dil{.} NaOH][] \underset{(B)}{CH3CHOHCH2CHO} ->[Δ][]\underset{(C)}{CH3 - CH = CH - CHO}}\\
\end{array}\]