Synthesis of Novel Partially Perfluorinated C-Glycosides and Their Application in Blanching Easel Painting Restoration

•Perfluorinated carbohydrate d-glucose synthesis using a green C-glycosylation.•Removing possible.•Ability to fill pores responsible of the optical effect of blanching (SEM-EDX experiments).•The need of chemical compounds for painting restoration, especially for the under-explored blanching.•More active than the reference (already described DC6G900) by decreasing the brightness.