| abstract |
The present invention relates to a process for the catalytic deoxygenation of N-oxides of pyridine, quinoline and isoquinoline to the corresponding heterocyclic compounds derived from pyridine, quinoline and isoquinoline, by using pinacol (2,3-dimethyl-2,3 -butanediol) as a reducing agent in the presence of a molybdenum (VI) catalyst, in an organic solvent, at atmospheric pressure and at a temperature of 130 ° C or, alternatively, by irradiation in a single-mode microwave oven at a maximum power of 150 W and at temperature of 130 ° C, generating as main byproducts water and acetone. |