“…However, it was the work of Ferrier and Prasad, depicted in Scheme 1, that rendered the process, 1 3, available on a preparative scale [5]. This reaction has come to be known as the Ferrier I rearrangement, and the cationic intermediate, 2, has played a relevant role in many carbohydrate transformations [6,7]. Almost simultaneously, the reductive elimination of vicinal disulfonates, e.g.…”