Abstract
The reaction of α-pinene-2, 3-epoxide (1), d-limonene-1, 2-epoxide (2) and styrene oxide (3) by the potassium permanganate coated molecular sieve catalyst (KMnO4/sieve) were investagated. Epoxide (1) was easily isomerized to 2, 2, 3-trimethyl-3-cyclopenten-1-acetaldehyde (5) with a high selectivity of 78.6%. 1-Methyl-3-isopropenyl--cyclopentyl-1-carboxaldehyde (10) was obtained as the main product from (2). Benzaldehyde (15) was produced preferentially when the reaction of (3) was conducted in the presence of toluene at 110°C for 3 h.
