The cyclization of citronellal to a mixture of menthone and isomenthone (2:1) is catalyzed by Al/Fe-Pillared Clay (Al/Fe-PILC) at 80 degreesC in 1,2-dichloroethane in good yield. At room temperature the products are isopulegol and neo-isopulegol, the isomer ratio depending on the reaction conditions.
Cyclization of citronellal to menthone and isomenthone catalyzed by Al/Fe-Pillared Clays / Cramarossa, Maria Rita; Forti, Luca; Pagnoni, Ugo Maria; M., Vidali. - In: SYNTHESIS. - ISSN 0039-7881. - STAMPA. - 1:1(2001), pp. 52-54. [10.1055/s-2001-9762]
Cyclization of citronellal to menthone and isomenthone catalyzed by Al/Fe-Pillared Clays
CRAMAROSSA, Maria Rita;FORTI, Luca;PAGNONI, Ugo Maria;
2001
Abstract
The cyclization of citronellal to a mixture of menthone and isomenthone (2:1) is catalyzed by Al/Fe-Pillared Clay (Al/Fe-PILC) at 80 degreesC in 1,2-dichloroethane in good yield. At room temperature the products are isopulegol and neo-isopulegol, the isomer ratio depending on the reaction conditions.
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