Six kinds of 5,5-(phenylmethylene)bis(2,2-dimethyl-1,3-dioxane-4,6-dione) derivatives were synthesized by the reaction of aromatic aldehydes and 2,2-dimethyl-1,3-dioxane-4,6-dione in biobased gluconic acid aqueous solution at 40 ℃. The reaction has the advantages of high yields (81%~92%), mild conditions, simple operation and environmental friendliness. Furthermore, GAAS can be reused for several times.
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