The thermolysis of α-pinene and verbenone epoxides in supercritical solvents
摘要:
Thermal transformations of alpha-pinene and verbenone epoxides were studied in supercritical solvents with complex compositions, including CO2, lower alcohols (ethanol and isopropanol), and water, over the temperature and pressure ranges 387-575 K and 135-215 atm. The main product from alpha-pinene epoxide in a supercritical solvent containing water was campholenic aldehyde and pinocamphone; the total content of these products in the reaction mixture was 80%. Suggestions concerning the mechanism of the thermal isomerization of alpha-pinene epoxide depending on the acidity of supercritical solvents were made. The direction of verbenone epoxide transformations was independent of the presence of water in the mixture. The main identified products were ketoalcohols with para-menthane and camphane frameworks.
The thermolysis of α-pinene and verbenone epoxides in supercritical solvents
作者:V. I. Anikeev、I. V. Il’ina、K. P. Volcho、A. Ermakova、N. F. Salakhutdinov
DOI:10.1134/s0036024410070058
日期:2010.1
Thermal transformations of alpha-pinene and verbenone epoxides were studied in supercritical solvents with complex compositions, including CO2, lower alcohols (ethanol and isopropanol), and water, over the temperature and pressure ranges 387-575 K and 135-215 atm. The main product from alpha-pinene epoxide in a supercritical solvent containing water was campholenic aldehyde and pinocamphone; the total content of these products in the reaction mixture was 80%. Suggestions concerning the mechanism of the thermal isomerization of alpha-pinene epoxide depending on the acidity of supercritical solvents were made. The direction of verbenone epoxide transformations was independent of the presence of water in the mixture. The main identified products were ketoalcohols with para-menthane and camphane frameworks.