2-ピネンオキシド, 2 (10) -ピネンオキシド及び1, 2-リモネンオキシドの合成ゼオライトを触媒とする熱分解反応 : テルペン類の合成ゼオライトを触媒とする反応 (その3)

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The thermo decomposition of 2-pinene oxide (1), 2 (10) -pinene oxide (2) and 1, 2-limonene oxide (3) in the presence of synthetic zeolites (3A, 4A, 5A and 13X zeolite) was investigated.<BR>Using with 3A zeolite at 200°C, α-campholenic aldehyde (5) was obtained with high selectivity (high 87%) in all converted products from (1). With 3A or 4A zeolite, phellandral (9) and β-pyronene aldehyde (11) were obtained as the two main products from (2). Under particular condi-tions, the ratio of (9) to (11) was 2 : 3. With 5A zeolite at 150190°C, carvenone (16) was obtained as the main product at high conversion (ca. 100% at most) and selectivity.
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