Question

In each reaction box, place the best reagent and conditions from the list below.

In each reaction box, place the best reagent and conditions from the list below. Your reagent for the third step is incorrect. In this step an alcohol is converted to an aldehyde.

Answer 1

First, acetic acid is reduced to ethyl alcohol with lithium aluminum hydride followed by water. The ethanol is oxidized to acetaldehyde by PCC (pyridinium chlorochromate). Then acetaldehyde reacts with methyl amount in presence of catalytic amount of acid to form the end product.
Note: PCC is a mild oxidising agent which oxidizes alcohol to aldehyde. Further oxidation to acid does not occur.