One-pot synthesis at room temperature of epoxides and linalool derivative pyrans in monolacunary Na 7 PW 11 O 39 -catalyzed oxidation reactions by hydrogen peroxide.

In this work, we describe a new one-pot synthesis route of valuable linalool oxidation derivatives ( i.e. , 2-(5-methyl-5-vinyltetrahydrofuran-2-yl propan-2-ol) (1a)), 2,2,6-trimethyl-6-vinyltetrahydro-2 H -pyran-3-ol (1b) and diepoxide (1c), using a green oxidant ( i.e. , hydrogen peroxide) under mild conditions ( i.e. , room temperature). Lacunar Keggin heteropolyacid salts were the catalysts investigated in this reaction. Among them, Na 7 PW 11 O 39 was the most active and selective toward oxidation products. All the catalysts were characterized by FT-IR, TG/DSC, BET, XRD analyses and potentiometric titration. The main reaction parameters were assessed. Special attention was dedicated to correlating the composition and properties of the catalysts and their activity.