Figure 11. de Bruyn-van Ekenstein-rearrangement between fructose (1), glucose (2) and mannose (3) via the common endiolate-form (4)

From

The Iodine Test for Reducing Sugars – A Safe, Quick and Easy Alternative to Copper(II) and Silver(I) Based Reagents

Holger Fleischer

World Journal of Chemical Education. 2019, 7(2), 45-52 doi:10.12691/wjce-7-2-3