Isomerization of α-pinene oxide was studied at 20–50 °C in the presence of commercial montmorillonites K-10 and K-30, acid-treated illite clay as well as synthetic aluminosilicate AS-36 using cyclohexane as a solvent. The catalysts were characterized by XRD, XRF, FTIR, MAS NMR, thermal analysis and N₂ low-temperature sorption methods The main reaction products at 99.9% conversion of the substrate are campholenic and iso-campholenic aldehydes, the largest amount of which (68.1 wt.%) is formed on illite clay treated by 10% HCl. The iso-campholenic/campholenic aldehydes ratio decreases from 0.7 to 0.25 with an increase of acidity of the catalyst from 47 to 153 μmol/g. The content of products with p-menthane structure (trans-carveol, trans-sorberol, p-cymene, pinol) reaches a maximum (33.0 wt.%) in the presence of medium-acid (104.0 μmol/g) K-10 clay. The amount of campholenic aldehyde in reaction mixture increases from 34.3 to 48.2 wt.%, and content of iso-campholenic aldehyde decreases from 33.7 to 17.7 wt.% with increasing the drying (calcination) temperature of illite clay from 50 to 600 °C respectively. The scheme for the formation of reaction products on clays was proposed.

在商业蒙脱土K-10和K-30，酸处理的伊利石粘土以及使用环己烷作为溶剂的合成铝硅酸盐AS-36的存在下，在20–50°C下研究了α--烯氧化物的异构化。通过XRD，XRF，FTIR，MAS NMR，热分析和N ₂低温吸附法对催化剂进行了表征。底物转化率为99.9％的主要反应产物是樟脑醛和异-樟脑醛，其中最大量（68.1）在经10％HCl处理的伊利石黏土上形成。随着催化剂的酸度从47μmol/ g增加到153μmol/ g ，异-campholenic /喜树碱醛的比率从0.7降低到0.25。对-薄荷烷结构的产品的含量（反式在中等酸（104.0μmol/ g）K-10粘土的存在下，β-香芹酚，反式-山梨醇，对-cymene，松油醇达到最大值（33.0 wt。％）。随着伊利石粘土的干燥（煅烧）温度分别从50°C升高到600°C ，反应混合物中的樟脑醛的含量从34.3 wt。％增加到48.2 wt。％，异樟脑醛的含量从33.7 wt。％减少到17.7 wt。％。 。提出了在粘土上形成反应产物的方案。