“…Most importantly, from the synthetic point of view, there were developed plenty of variants of this type of rearrangement. By way of example, the Carroll [6,7], the Johnson [8], the Eschenmoser [9,10] (including the Overman variant [11,12]), the Reformatsky [13,14], the ester enolate [15][16][17], and the Ireland-Claisen rearrangements [18][19][20] should be mentioned as some of the synthetically most useful variants regularly applied with non-fluorinated compounds.…”