References
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- Hantzsch , A. 1882 . Ann. , 215 : 1
- 1,4-dihydropyridines in boiling hexane or benzene were not oxidized with MnO2/Bentonite system
- MnO2/Bentonite A was prepared using 1:2 ratio of KMnO4 and Mexican Bentonite in acetone, until discharge the purple color of the solution, filtered and the solid brown activated for 24 h. at 120°C. MnO2/Bentonite B was prepared in the same form, but using a relation KMnO4 and Mexican Bentonite 1:4
- Loev , B. and Snader , K. 1965 . J. Org. Chem. , 30 : 1914
- Kamal , A. , Ahmad , M. , Mohd , N. and Hamid , A. 1969 . Bull. Soc. Chem. Jap. , 37 : 610
- Alvarez , C. , Cano , A. C. , Rivera , V. and Márquez , C. 1987 . Synthetic Commun. , 17 : 279 The Mexican Bentonite was used for to regenerate carbonyl compounds from their corresponding oximes and semicar-bazones
- Cano , A. C. , Delgado , F. , Códoba , A. A. , Márquez , C. and Alvarez , C. 1988 . Synthetic Commun. , 18 : 2051
- Interesting results were observed in the oxidation of 4-alkyl-1,4-dihydropyridines with MnO2/Bentonite, following communication in this journal