Various conditions for glycosylation (Koenigs–Knorr, Helferich, trichloroacetimidate, Fischer– Raske, phase??transfer methods) of 3??ethoxy??4??hydroxybenzaldehyde (ethyl vanillin), 3?? hydroxy??2??methyl??4??pyranone (maltol) and 2, 5??dimethyl??4??hydroxy??3 (2 H)??furanone (furaneol®) were evaluated, taking into account yields and ease of preparation (eg, utilized donor, catalyst, conditions). The best results were achieved employing phase transfer ...
