Solution: The following is a stepwise synthesis by applying Bronsted-Lowry (B-L) and Lewis acid-base (LA and LB) reactions. Please use electron-pushing arrows to show this transformation logically.

Problem

The following is a stepwise synthesis by applying Bronsted-Lowry (B-L) and Lewis acid-base (LA and LB) reactions. Please use electron-pushing arrows to show this transformation logically.